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| Question | Answer |
|---|---|
| Digestive tract flow in dog | Oral cavity -> pharynx -> esophagus -> stomach -> small intestine -> large intestine -> rectum -> anus. |
| Respiratory tract flow in dog | Nasal cavity -> pharynx -> larynx -> trachea -> bronchi -> lungs. |
| Main idea of digestive tract flow | Food path for ingestion, digestion, absorption, feces formation, and defecation. |
| Main idea of respiratory tract flow | Air path for respiration or gas exchange, phonation, and olfaction. |
| Splanchnology | Study of visceral organs of the digestive, respiratory, and urogenital systems. |
| Digestive system definition | Parts responsible for digestion, absorption of nutrients, and elimination of waste as feces. |
| Digestive apparatus in Miller’s Anatomy of the Dog | Oral cavity, pharynx, alimentary canal, and accessory organs. |
| Three main components of digestive system in lecture | Digestive tract or alimentary canal, digestive glands, and accessory digestive structures. |
| Digestive tract or alimentary canal included structures | Oral cavity, pharynx, esophagus, stomach, small intestine, large intestine, rectum, and anus. |
| Digestive tract or alimentary canal function | Pathway of ingesta or food. |
| Digestive glands included structures | Salivary glands, liver with gallbladder, and pancreas. |
| Digestive glands function | Secrete saliva, bile, pancreatic juice, and hormones. |
| Accessory digestive structures | Teeth, tongue, cheeks, lips, palate, and in book context salivary glands, liver, and pancreas. |
| Accessory digestive structures function | Mechanical processing and support of digestion. |
| Oral cavity | First segment of the digestive tract. |
| Oral cavity dorsal boundary | Hard palate, soft palate, and upper teeth. |
| Oral cavity lateral boundary | Cheeks. |
| Oral cavity ventral boundary | Lower teeth, tongue, and floor of mouth. |
| Oral cavity rostral boundary | Lips. |
| Oral cavity caudal boundary | Oropharynx or isthmus of fauces. |
| Main job of oral cavity | Receives food, begins mechanical breakdown using teeth and tongue, and mixes food with saliva. |
| Two divisions of oral cavity in book guide | Vestibule and oral cavity proper. |
| Vestibule of oral cavity | Space outside teeth and gums but inside lips and cheeks. |
| Pharynx | Musculomembranous passage common to digestive and respiratory systems. |
| Pharynx connection | Connects oral and nasal cavities rostrally to esophagus and larynx caudally. |
| Three parts or apertures of pharynx | Nasopharynx, oropharynx, and laryngopharynx. |
| Nasopharynx opens to | Nasal cavity. |
| Oropharynx opens to | Oral cavity. |
| Laryngopharynx leads to | Larynx and esophagus. |
| Pharynx function keyword | Common passageway for food, water, and air. |
| Esophagus | Long muscular tube from pharynx to stomach; passageway for bolus. |
| Bolus | Ingesta or food mass passing along the esophagus. |
| Possible pH of bolus | Slightly acidic or slightly alkaline. |
| Segments of esophagus | Cervical, thoracic, and abdominal. |
| Incorrect esophageal segment to avoid | Lumbar esophagus. |
| When thoracic esophagus becomes abdominal esophagus | After passing through the esophageal hiatus of the diaphragm. |
| Esophagus layers from inside to outside | Tunica mucosa -> submucosa -> muscularis -> adventitia. |
| Outer layer of esophagus | Adventitia. |
| Adventitia | Thicker connective tissue compared with serosa. |
| Stomach | Muscular sac or bag that temporarily stores chyme. |
| Chyme | Ingesta inside the stomach after bolus mixes with gastric juice; strongly acidic due to hydrochloric acid. |
| Four parts or regions of stomach | Cardia -> fundus -> body -> pylorus. |
| Cardiac sphincter location | Between esophagus and cardia. |
| Pyloric sphincter location | Between pylorus and duodenum. |
| Main function of stomach sphincters | Prevent backflow of ingesta. |
| Stomach layers from inside to outside | Mucosa -> submucosa -> muscularis -> serosa. |
| Outer layer of stomach and intestines | Tunica serosa. |
| Serosa | Thinner serous connective tissue covering compared with adventitia. |
| Gastric glands especially found in | Fundic region. |
| Chief cells of gastric glands secrete | Pepsinogen. |
| Parietal cells of gastric glands secrete | Hydrochloric acid or HCl. |
| Pepsinogen becomes | Pepsin. |
| Gastric juice includes | Pepsin and hydrochloric acid. |
| Parietal surface of stomach | Convex surface facing the abdominal wall or diaphragm side. |
| Visceral surface of stomach | Surface facing other internal organs. |
| Curvatures of stomach | Greater curvature and lesser curvature. |
| Extremities of stomach | Left extremity and right extremity. |
| Stomach entrance | Cardia. |
| Stomach exit | Pylorus. |
| Small intestine segments | Duodenum, jejunum, and ileum. |
| Why small intestine is called small | Because of smaller diameter, not because of length. |
| Small intestine length compared with large intestine | Small intestine is longer than large intestine. |
| Duodenum | First and most fixed segment of the small intestine; starts at pylorus. |
| Important ducts that empty into duodenum | Bile duct and pancreatic duct. |
| Duodenum function keyword | Receives bile and pancreatic juice. |
| Jejunum | Longest and most movable or mesenteric portion of the small intestine. |
| Jejunum function keyword | Most absorptive segment. |
| Ileum | Terminal or last segment of the small intestine. |
| Important lymphoid structure in ileum | Peyer’s patches. |
| Ileum function keyword | Intestinal defense against microorganisms. |
| Peyer’s patches | Lymphoid nodules in the ileum that help intestinal defense against microorganisms. |
| Fixed or non-movable portion of small intestine | Duodenum. |
| Movable or mesenteric portions of small intestine | Jejunum and ileum. |
| Large intestine segments | Cecum, colon, rectum, and anus. |
| Cecum | Counterpart of human appendix; may serve as fermentation site in hindgut fermenters such as horse and rabbit. |
| Cecum function keyword | Fermentation in some animals. |
| Colon | Longest segment of large intestine in the lecture; main site of water and electrolyte reabsorption. |
| Colon function | Forms more solid feces by water and electrolyte reabsorption. |
| Normal colon transit time mentioned in lecture | About 12 hours. |
| Rectum | Terminal or last segment of large intestine; temporary storage of feces before defecation. |
| Rectum function keyword | Fecal storage. |
| Anus | Terminal segment or opening of the alimentary canal. |
| Anal sphincters | Internal anal sphincter and external anal sphincter. |
| Function of anus | Controls fecal elimination. |
| Diarrhea mechanism | Transit time becomes too fast, so water and electrolytes are not reabsorbed well, producing watery feces. |
| Constipation mechanism | Transit time becomes too slow, so too much water is reabsorbed, producing hard feces. |
| Defecation | Act of expelling feces or waste products. |
| Major salivary glands in dog | Parotid, mandibular or submandibular, sublingual, and zygomatic or orbital gland. |
| Parotid gland location | At the side of the face or head-neck region. |
| Parotid gland secretion type in dog | Seromucous or mixed per book; lecture stresses mixed-type in dog. |
| Mandibular or submandibular gland location | Near the angle of the mandible. |
| Mandibular or submandibular gland secretion type | Mixed secretion. |
| Sublingual gland location | Under or near the tongue. |
| Sublingual gland portions | Monostomatic and polystomatic portions in book. |
| Sublingual gland secretion type | Mixed secretion. |
| Zygomatic or orbital gland location | Near the zygomatic or orbital region. |
| Zygomatic or orbital gland note | In domestic mammals, it is notable in dog and cat. |
| Zygomatic or orbital gland secretion type | Mixed secretion. |
| Serous saliva | Watery saliva. |
| Mucous or mucoid saliva | Thick saliva because of mucin. |
| Mixed saliva | Combination of serous and mucous saliva. |
| Liver description | Nutritional guardian of the body and largest gland of the body. |
| Largest gland of the body | Liver. |
| Largest organ of the body | Skin. |
| Lightest organ mentioned in lecture | Lungs, because of air spaces. |
| Liver secretion | Produces bile. |
| Gallbladder function | Temporary storage of bile produced by the liver. |
| Structural unit of liver | Hepatic lobule. |
| Shape of hepatic lobule classically under microscope | Six-sided. |
| Liver position | Situated obliquely against the visceral surface of the diaphragm. |
| Liver surfaces | Parietal surface and visceral surface. |
| Liver has | Surfaces plus borders. |
| Dog liver lobes | Left lateral, left medial, right lateral, right medial, quadrate, and caudate lobes. |
| Special process of caudate lobe in dog liver | Papillary process. |
| Pancreas location | Gland situated between or within the duodenal loop. |
| Two portions of pancreas | Exocrine portion and endocrine portion. |
| Exocrine pancreatic cells | Acinar cells. |
| Exocrine secretion of pancreas | Pancreatic juice. |
| Pancreatic amylase digests | Carbohydrates. |
| Pancreatic lipase digests | Fats. |
| Trypsin and chymotrypsin digest | Proteins. |
| Inactive forms of trypsin and chymotrypsin | Trypsinogen and chymotrypsinogen. |
| Endocrine part of pancreas | Islets of Langerhans. |
| Endocrine secretions of pancreas | Glucagon and insulin. |
| Alpha cells of pancreatic islets secrete | Glucagon. |
| Glucagon function | Increases blood glucose. |
| Beta cells of pancreatic islets secrete | Insulin. |
| Insulin function | Decreases blood glucose. |
| Teeth function | Chopping, grinding, and chewing. |
| Morphological classes of teeth | Incisors, canine, premolars, and molars. |
| Teeth in deciduous or temporary dentition | Incisors, canines, and premolars only. |
| Teeth absent in deciduous dentition | Molars. |
| Dentition where molars appear | Permanent dentition only. |
| Tooth regions | Crown, neck, and root. |
| Tooth layers | Enamel, cementum, dentin, and pulp cavity. |
| Enamel location | Outer layer of the crown. |
| Cementum location | Outer layer of neck and root. |
| Dentin location | Under enamel and cementum. |
| Pulp cavity location | Inside the tooth. |
| Carnassial teeth | Shearing or cutting teeth of the dog. |
| Carnassial teeth pair | Upper fourth premolar and lower first molar. |
| Carnassial teeth function | Important for cutting flesh. |
| Tongue support | Supported by muscular sling including mylohyoid muscles. |
| Parts of tongue | Root, body, and apex. |
| Dorsum of tongue | Free dorsal surface of tongue. |
| Lingual papillae types | Filiform, fungiform, foliate, and vallate or circumvallate. |
| Filiform papillae | Bristle-like papillae. |
| Fungiform papillae | Mushroom-shaped papillae. |
| Foliate papillae | Leaf-like papillae. |
| Vallate or circumvallate papillae | Large papillae near the root of the tongue. |
| Prominent papillae in dog | Vallate and foliate papillae. |
| Soft palate | Caudal muscular part of palate. |
| Soft palate parts | Base, free border, oral surface, and aboral or nasopharyngeal surface. |
| Anterior pillar or palatoglossal arch | Runs from soft palate toward tongue. |
| Posterior pillar or palatopharyngeal arch | Runs from soft palate toward pharyngeal or esophageal region. |
| Hard palate | Rostral bony part of palate. |
| Hard palate boundaries | Bounded by alveolar arches and continuous caudally with soft palate. |
| Bony basis of hard palate | Palatine processes of incisive or premaxilla and maxilla plus horizontal part of palatine bone. |
| Hard palate function | Separates oral and nasal cavities. |
| Difference between hard palate and soft palate | Hard palate is rostral and bony; soft palate is caudal and muscular or membranous. |
| Respiratory system functions | Respiration, phonation, and olfaction. |
| Respiration | Exchange of gases, mainly oxygen and carbon dioxide. |
| Phonation | Voice production; larynx is important. |
| Olfaction | Sense of smell; nasal cavity and olfactory receptors are involved. |
| Nasal cavity | Cylindrical passage enclosed by facial bones; warms, moistens, and filters air. |
| Pharynx in respiratory system | Common passageway for air plus food and water. |
| Larynx in respiratory system | Voice box; cartilaginous valvular apparatus connecting pharynx and trachea. |
| Trachea in respiratory system | Windpipe; patent or noncollapsible tube due to tracheal rings. |
| Bronchi in respiratory system | Right and left principal bronchi formed at tracheal bifurcation or carina; branch into lobar and segmental bronchi. |
| Lungs in respiratory system | Principal organs of respiration; gas exchange occurs in alveoli. |
| Nasal cavity dorsal boundary | Nasal bone. |
| Nasal cavity lateral boundary | Premaxilla or incisive bone and maxilla. |
| Nasal cavity ventral boundary | Palatine bone or hard palate area. |
| Nasal cavity rostral opening | Anterior nares or nostrils. |
| Nasal cavity caudal opening | Posterior nares or choanae. |
| Structure dividing left and right nasal cavities | Nasal septum. |
| Bony basis of nasal septum | Vomer plus other tissues or cartilage. |
| Nasal conchae or turbinates function | Help warm, moisten, and filter inhaled air. |
| Why pharynx belongs to both digestive and respiratory systems | It is a common passageway for food, water, and air. |
| Larynx functions from lecture | Regulates air volume, prevents entry of foreign bodies into lungs, and produces voice. |
| Clinical cue for foreign material entering airway | Entry of food or water into airway can lead to aspiration pneumonia. |
| Lecture list of paired laryngeal cartilages | Arytenoid, corniculate, and cuneiform cartilages. |
| Lecture list of unpaired laryngeal cartilages | Epiglottic, cricoid, and thyroid cartilages. |
| Lecture total laryngeal cartilages to memorize | Three paired plus three unpaired equals nine cartilages. |
| Miller book note on laryngeal cartilages | Describes epiglottic, thyroid, cricoid, arytenoid, sesamoid, and interarytenoid cartilages; arytenoid is paired. |
| Corniculate and cuneiform in book context | Treated as processes or tubercles related to arytenoid or epiglottic region. |
| Recitation tip for laryngeal cartilage conflict | Memorize the lecture list if instructor emphasized three paired plus three unpaired equals nine. |
| Trachea | Cartilaginous and membranous tube extending from larynx to its bifurcation into bronchi. |
| Patent meaning for trachea | Always open. |
| Reason trachea is patent | Hyaline tracheal rings or cartilages. |
| Why esophagus is usually collapsed | It has no tracheal rings. |
| Shape of dog tracheal rings | C-shaped or U-shaped because they do not meet dorsally. |
| Dorsal gap of dog tracheal rings | Bridged by trachealis muscle and connective tissue. |
| Trachea layers highlighted in lecture | Fascia propria or adventitia outside, hyaline cartilaginous rings, fibroelastic layer or annular ligaments, trachealis muscle, and mucous membrane inside. |
| Tracheal mucosa epithelium | Pseudostratified ciliated columnar epithelium, non-keratinized. |
| Carina | Point or crest of tracheal bifurcation where trachea divides into right and left principal bronchi. |
| Bronchial branching sequence | Principal or primary bronchi -> lobar or secondary bronchi -> segmental or tertiary bronchi -> bronchioles -> alveolar ducts or sacs -> alveoli. |
| Lungs | Principal organs of respiration; paired structures occupying most of the thoracic cavity. |
| Gas exchange in lungs occurs in | Alveoli. |
| Apex of lung | Pointed cranial part at the thoracic inlet. |
| Base of lung | Wide caudal part adjacent to the diaphragm. |
| Costal surface of lungs | Faces the ribs. |
| Mediastinal or medial surface of lungs | Faces the heart and mediastinum. |
| Diaphragmatic surface of lungs | Faces the diaphragm. |
| Interlobar surfaces of lungs | Surfaces between adjacent lung lobes. |
| Borders or margins of lungs from lecture | Dorsal border and ventral border. |
| Additional lung margin in book | Basal margin near diaphragm. |
| Right lung lobes of dog | Cranial, middle, caudal, and accessory lobes. |
| Left lung lobes of dog | Cranial and caudal lobes. |
| Parts of left cranial lung lobe in dog | Cranial part and caudal part. |
| Pleura | Serous or mesothelial membrane covering lungs and lining thoracic cavity or mediastinum. |
| Visceral or pulmonary pleura | Covers the lung surface directly. |
| Parietal pleura | Lines the thoracic wall and mediastinum. |
| Standard divisions of parietal pleura | Costal, mediastinal, and diaphragmatic. |
| Lecture drawing emphasis for parietal pleura reflections | Reflections facing vertebrae dorsally, sternum ventrally, and diaphragm caudally. |
| Pleural cavity | Potential space with a thin fluid film between parietal and visceral pleura; normally not a large open space. |
| Endothoracic fascia | Subserous tissue associated with parietal pleura covering the thoracic wall. |
| Pleura versus peritoneum | Pleura lines thoracic cavity; peritoneum lines abdominal cavity. |
| Diaphragm role in body cavities | Separates thoracic and abdominal cavities. |
| Mediastinum | Potential midline space between right and left pleural cavities or lungs; visible in radiographs. |
| Precardial or cranial mediastinum | Cranial to heart; contains trachea, esophagus, blood vessels, nerves, thymus, and lymph nodes. |
| Cardiac or middle mediastinum | At level of heart; contains heart and pericardium and relates to esophagus, tracheal bifurcation, thoracic duct, vessels, and nerves. |
| Postcardial or caudal mediastinum | Caudal to heart; contains aorta, azygos vein, thoracic duct, esophagus, vagal nerves, and related vessels and nerves. |
| Diaphragm | Skeletal muscle forming partition between thoracic and abdominal cavities; important muscle of respiration. |
| Three parts of diaphragm | Sternal part, costal part, and lumbar part. |
| Sternal part of diaphragm faces | Sternum. |
| Costal part of diaphragm faces | Ribs. |
| Lumbar part of diaphragm faces | Lumbar vertebrae or crura. |
| Aortic hiatus transmits | Aorta, azygos vein, and cisterna chyli. |
| Esophageal hiatus transmits | Esophagus, esophageal branch of gastric artery, and vagal trunks. |
| Caval foramen or hiatus venae cavae transmits | Caudal vena cava. |