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Animal Anatomy Vocab
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Term | Definition |
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monogastric | having a stomach with only a single compartment |
mouth | the natural opening through which food passes into the body of an animal and which in vertebrates is typically bounded externally by the lips and internally by the pharynx and encloses the tongue, gums, and teeth |
esophagus | a muscular tube that conveys food from the mouth to the stomach and passes from the pharynx down the neck between the trachea and the spinal column and behind the left bronchus where it pierces the diaphragm slightly to the left of the mid |
stomach | a saclike expansion of the digestive tract of a vertebrate that is located between the esophagus and duodenum and typically consists of a simple often curved sac with an outer serous covering, a strong muscular wall that contracts rhythmically |
small intestine | the narrow part of the intestine that lies between the stomach and colon, consists of duodenum, jejunum, and ileum, secretes digestive enzymes, and is the chief site of the digestion of food into small molecules which are absorbed into the body |
cecum | a cavity open at one end (such as the blind end of a duct) |
large intestine | a cavity open at one end (such as the blind end of a duct) |
rectum | a cavity open at one end (such as the blind end of a duct) |
ruminant | the terminal part of the intestine from the sigmoid colon to the anus |
rumen | the large first compartment of the stomach of a ruminant in which cellulose is broken down by the action of symbiotic microorganisms |
reticulum | the second compartment of the stomach of a ruminant in which folds of the mucous membrane form hexagonal cells |
omasum | the third chamber of the ruminant stomach that is situated between the reticulum and the abomasum |
abomasum | the fourth compartment of the ruminant stomach that follows the omasum and has a true digestive function |
salivary gland | a small organ that produces saliva in the mouth |
gallbladder | a membranous muscular sac in which bile from the liver is stored |
pancreas | a large lobulated gland of vertebrates that secretes digestive enzymes and the hormones insulin and glucagon |
cardiac valve | any of the valves that control blood flow to and from the heart and that include the atrioventricular valves, the aortic valve, and the pulmonary valve |
pyloric valve | the circular fold of mucous membrane containing a ring of circularly disposed muscle fibers that closes the vertebrate pylorus |
villi | a small slender often vascular process |
absorption | the process of absorbing something or of being absorbed |
alimentary tract | the tubular passage typically extending from the mouth to the anus or cloaca that functions in digestion and absorption of food and elimination of residual waste and that in most mammals |
accessory digestive organ | An organ that helps with digestion but is not part of the digestive tract. The accessory digestive organs are the tongue, salivary glands, pancreas, liver, and gallbladder. |
crop | a pouched enlargement of the esophagus of many birds that serves as a receptacle for food and for its preliminary maceration |
proventriculus | the glandular or true stomach of a bird that is situated between the crop and gizzard |
gizzard | the muscular enlargement of the digestive tract of birds that has usually thick muscular walls and a tough horny lining for grinding the food and when the crop is present follows it and the proventriculus |
cloaca | the common chamber into which the intestinal and urogenital tracts discharge especially in monotreme mammals, birds, reptiles, amphibians, and elasmobranch fishes |
kidney | one of a pair of vertebrate organs situated in the body cavity near the spinal column that excrete waste products of metabolism, in humans are bean-shaped organs lying behind the peritoneum in a mass of fatty tissue |
duodenum | the first part of the small intestine extending from the pylorus to the jejunum |
pharynx | the muscular tubular passage of the vertebrate digestive and respiratory tracts extending from the back of the nasal cavity and mouth to the esophagus |
liver | a large very vascular glandular organ of vertebrates that secretes bile and causes important changes in many of the substances contained in the blood (as by converting sugars into glycogen which it stores up until required and by forming urea) |
yolk sac | a membranous sac of most vertebrates that encloses the yolk, is attached in most forms through the yolk stalk with the intestinal cavity of the embryo, and is supplied with blood vessels that transport nutritive yolk products to the developing embryo |
ileocecal valve | the valve formed by two folds of mucous membrane at the opening of the ileum into the large intestine |