click below
click below
Normal Size Small Size show me how
Circ+Diges. Systems
Science MP4, 2024, 7TH GRADE
Term | Definition |
---|---|
Amylase | Enzyme in saliva that breaks the chemical bonds in starches |
Bolus | A soft mass of chewed food. |
Pharynx | throat; passageway for food and liquid to the esophagus and air to the larynx |
Esophagus | The muscular tube through which food passes from the throat to the stomach. |
Peristalsis | The involuntary constriction and relaxation of the muscles of the intestine or esophagus that pushes food down. |
Esophageal Sphincter | Muscle at the upper or lower end of the esophagus that prevents backflow of stomach acid. |
Stomach | Large muscular sac that continues the mechanical and chemical digestion of food; digests food by mixing it with digestive juices and churns it physically. |
Pepsin | Enzyme that breaks down proteins into smaller polypeptide fragments |
Hydrochloride Acid (HCI) | A necessary stomach acid which aids in the destruction of bacteria and serves as a good preservative. |
Chyme | Partially digested, semiliquid food mixed with digestive enzymes and acids in the stomach; passes by the stomach into the duodenum. |
Pyloric Sphincter | Controls passage of food from stomach to small intestine |
Duodenum | The first part of the small intestine that connects to the stomach |
Jejunum | The middle part of the small intestine between the duodenum and ileum that helps with further digestion. |
Ileum | the last and longest portion of the small intestine that further helps to digest food. |
Galbladder | An organ under the liver that stores and releases bile |
Large Intestine (colon) | Absorbs water and then moves useless waste out of the body. |
Liver | A large organ that removes toxins from the body's blood supply and produces bile that assists in digestion |
Pancreas | A gland behind the stomach that releases enzymes into the small intestine to help with digestion |
Rectum | The end of the large intestine that lines the colon to the anus; where waste is discarded. |
Arteries | Blood vessels that carry oxygen-rich blood away from the heart |
Veins | Blood vessels that carry oxygen-poor blood back to the heart |
Left Atrium | Chamber that receives oxygenated blood from the pulmonary veins and pumps it into systemic circulation. |
Right Atrium | Chamber of the heart that receives blood from the vena cava and coronary sinus. |
Right Ventricle | Pumps oxygen-poor blood to the lungs |
Left Ventricle | Pumps oxygenated blood to the body via the aorta |
Capillaries | Smallest blood vessels in the body which transport blood |
Valve | A flap of tissue in the heart or a vein that prevents blood from flowing backward. |
Vena Cava | One of two large vessels (superior and inferior) that return deoxygenated blood to the right atrium of the heart. |
Aorta | The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body. |
Pulmonary Veins | Carries the oxygenated blood from the lungs into the left atrium of the heart |
Pulmonary Artery | Carries deoxygentated blood from the heart's right ventricle to the lungs |
Mitral Valve | Valve between the left atrium and the left ventricle; bicuspid valve |
Aortic Valve | The semilunar valve separating the aorta from the left ventricle that prevents blood from flowing back into the left ventricle. |
Tricuspid Valve | Valve situated at the opening of the right atrium of the heart into the right ventricle and that consists of three triangular membranous flaps. |
Pulmonary Valve | Valve positioned between the right ventricle and the pulmonary artery |