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Gastrointestinal sys
| Question | Answer |
|---|---|
| Parts of the GIT | Oral cavity Pharynx Oesophagus Stomach Small intestine Colon (large intestine) Rectum Anus |
| Additional organs of GIT | Salivary glands (produce saliva to aid in digestion and chewing) Liver ( Biggest gland resp for filtration of any metabolic waste form digestive system) Gall bladder (stores excess bile) Pancreas (endocrine organ excreting insulin and enzymes) |
| illiocecul junction | Point where small intestine opens up into the large intestine |
| Which structure separates the thoracic cage from the abdomen | Diaphragm |
| Abdominopelvic cavity | From diaphragm to anterior superior iliac spine= abdomen From anterior superior iliac spine to pelvic diaphragm= pelvis |
| Peritoneal cavity | peritoneum (connective tissue) Secretes fluid and holds organs of abdomen together. |
| intra peritoneal organ | surrounded by peritoneum |
| Retro peritoneum organ | Anterior or posterior surface or no covering by peritoneum |
| Rectus abdominus origin | Pubic symphysis, Pubic crest |
| Rectus abdominus insertion | Costal cartilages of ribs 5-7 and the xiphoid process |
| Nerve supply of rectus abdominis | T7-T12 |
| Function of rectus abdominis | Flexes the vertebral column, compresses abdominal contents, tenses abdominal wall. |
| Blood supply of rectus abdominus | Superior and inferior epigastric artery and veins |
| External oblique muscle origin | Ribs 5 to 8 |
| External oblique insertion | Lateral iliac crest Aponeurosis at linea alba |
| External oblique nerve supply | Spinal T7-T12 |
| External oblique function | Compression of abdominal content Anterior and lateral flexes the abdominal content Anterior and lateral flexes vertebral column Rotate the trunk to opposite side |
| Blood supply Of external oblique | Deep circumflex iliac artery and vein |
| Internal oblique origin | Thoracolumbar fascia iliac crest Lateral 2/3 of inguinal ligament |
| Internal oblique Insertion | Ribs 8-10 Aponeurosis at linea alba Pubic crest Pectineal line |
| Nerve supply of internal oblique | T7-T12, L1 |
| Function of internal oblique | Compression of abdominal content Anterior and lateral flexes the vertebral column Rotate trunk to the same side |
| Blood supply of internal oblique | Subcostal artery and vein |
| Pathway of lymph drainage from internal and external iliac nodes | External and internal iliac nodes>common iliac nodes>lumbar> nodes>hepatic nodes >coaliac nodes NB!! all these lymph nodes drain into cisterna chyli |
| To which nodes do organs of the abdomen drain to? | Lumber lymph nodes |
| Peritoneum | Continuous transparent serous membrane which lines the abdominal cavity (parietal peritoneum) and covers the viscera (visceral peritoneum). In the peritoneal cavity > peritoneal fluid. |
| Intra peritoneal organs | Completely covered in visceral peritoneum and are minimally moveable |
| Retroperitoneal organs | Has visceral peritoneum on part of the organ or not covered at all. |
| Blood supply: Paired branches to abdominal wall | lumbar artery |
| Blood supply: paired branches to paired glands or organs | Renal artery/ gonadal artery |
| Blood supply: unpaired branches to digestive tract | Celiac trunk, (superior and inferior) mesentery artery |
| Branches of the celiac trunk | Left gastric artery (supplies the lesser curvature of stomach), Common hepatic artery, Splenic artery |
| Which artery supplies the adrenal gland | Suprarenal artery |
| Kidneys are supplied by | renal arteries |
| Why are arteries behind veins | For protection so that you do not bleed out when trauma happens |
| Inferior vena cava drains blood below the diaphragm, except... | the digestive organs/system |
| Where do digestive organs drain into? | Into portal vein which then enters the liver where blood is detoxified then travels out of liver via hepatic veins to the inferior vena cava and back to heart |
| Oesophageal constriction. | Pharyngeosophageal junction arch of aorta Diaphragmatic constriction |
| What drains into major duodenal papilla | Bile duct |
| Why does jejunum have thicker mucous membrane | Cause it has to absorb more nutrients,.NB! it also has a richer blood supply. |
| Thickened ligament that allows the large intestine to stretch and expand as well as contract | Tenia coli |