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30 Cards in this Set
- Front
- Back
Gastrointestinal (GI) tract |
A long hollow tube from the mouth to the anus where digestion & absorption occure |
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The digestive system carries out six basic processes |
Ingestion of food into the mouth Movement of food along the digestave tract Mechanical preparationof food for digestion Chemical digestion of food Absorption of digested food into the circulatory & lymphatic systems Elimination of indigestible substances & waste products from the bidy by defecation |
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Chemical digestion |
A form of digestion that involves the addition of enzymes that break down nutrients |
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Lymphatic systems |
A network of lymphoid organs, lymph nodes, lymph duct, lymphatic tissues, lymph capillaries & lymph vessles that produce & transports lymph fluid from the tissue to the circulatory system. |
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There are four important functions of the lymphatic system |
Destruction of bacteria & other foreign substances that are present in lymp nodes Specific immune responces that aid in manufacturing antibodies to destroy bacteria & foreign substance The return if interstitial fluid to the bloodstream Prevention of excessive accumulation of tisdue fulid & filtered proteins by drainage into highly permeable lymphatic capillaries in the connective tissue |
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Epiglottis |
The cartilage of the throat that guards the entrance to the trachea & prevents fluid or food from entering it during the act of swallowing |
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Bolus |
a food & saliva digestive mix that is swallowed & then moved through the digsetive tract |
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Peristalsis |
The process by which muscles in the esophagus & intestines push fluid through the gastrointestinal tract in a wave like motion |
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Cardiac sphincter |
Sits at the upper portion of tbe stomach; prevents food & stomach axid from splashing back into the esophagus from the stomach; also called the esophagus sphincter |
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Chyme |
The semiliquid mass of partly digested food expelled by the stomach into the duodenum |
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Pyloric sphincter |
Seprates the stomach from the small intestines |
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Duodenum |
The top portion of tbe small intestine |
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Jejunum |
In of three segments if the small intestine |
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Ileum |
one of three sections of the small intestine |
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Bile |
greenish yellow secretion that is produced in the liver and passed to the gallbladder for concentration, storage, or transport into the first region of the small intestine, the duodenum. Its function is to aid in the digestion of fats in the duodenum. |
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Villi |
Finger-like projections from the folds of the small intestines |
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Microvilla |
The tiny harelike projections on each cell villus that can trap nurrient particles & transport them into the cells for absorbtion |
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Colon |
The lower portion of the large intestine, the primary function of which is to absorb water; its segments are the ascending colon, the transverse colon, & the sigmoid colon |
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Electrolytes |
A mineral that exists as a charged iob in the body & that is extremely important for normal cellular function |
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Glucose |
A simple sugar; the form in which all carbohydrates are used as the bodys principle energy source. |
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Amino acids |
Nirtogen-containing compounds that are building blocks for protein |
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Esophagus |
the part of the alimentary canal that connects the throat to the stomach; the gullet. In humans and other vertebrates it is a muscular tube lined with mucous membrane. |
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Liver |
The liver, an organ only found in vertebrates, detoxifies various metabolites, synthesizes proteins, and produces biochemicals necessary for digestion. In humans, it is located in the right upper quadrant of the abdomen, below the diaphragm. |
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Gallbladder |
Your gallbladder is a four-inch, pear-shaped organ. It's positioned under your liver in the upper-right section of your abdomen. The gallbladder stores bile, a combination of fluids, fat, and cholesterol. Bile helps break down fat from food in your intestine. The gallbladder delivers bile into the small intestine. |
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Pancreas |
a large gland behind the stomach that secretes digestive enzymes into the duodenum. Embedded in the pancreas are the islets of Langerhans, which secrete into the blood the hormones insulin and glucagon. |
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Large intestine |
The large intestine, also known as the large bowel or colon, is the last part of the gastrointestinal tract and of the digestive system in vertebrates. Water is absorbed here and the remaining waste material is stored as feces before being removed by defecation. |
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Appendix |
a tube-shaped sac attached to and opening into the lower end of the large intestine in humans and some other mammals. |
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Stomach |
the internal organ in which the major part of the digestion of food occurs, being (in humans and many mammals) a pear-shaped enlargement of the alimentary canal linking the esophagus to the small intestine. |
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Small intestine |
the part of the intestine that runs between the stomach and the large intestine; the duodenum, jejunum, and ileum collectively. |
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Rectum |
the final section of the large intestine, terminating at the anus. |