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digestive system#1

key term

digestive system the gastrointestinal system,resposible for the physical and chemical breakdow of food so that it can be take into the bloodstream and used by body cell and tissues.
alimentary canal long muscular tube that begings at the mouth and indudes the mouth pharynx,esophagus,stomach,small intestine and anus
mouth the bucal cavity,recives food as it enters the boby
teeth special structures in the mouth that physically break down food by chewing.
tongue muscular organ that contains special recepors(tastebuds,taste sweet,salt,sour,and bitter sensations
salivary glands the parotid sublingual and submandibilar produce a liquid "saliva"
pharynx(throat) The tube that connects the mouth to the internal body cavity in which food is digested.
esophagus the muscular tude dorsal to (behind)the trachea and receives the bolus from pharyxn and cares the bolus the stomach
peristalsis rhythmic,wavelike motion of involuntay muscle
stomach enlarged and dilated part of the alimentar canal
small intestine coiled section of the alimentary canal ;is where the vast majority of digestion and absorption of food takes place.
anus external opening of the anal canal o rectum
pancreas gland that is dorsal to the stomach and that secrete insulin and digestive juices
liver the largest gland inthe body and is an accessory organ to the digestive system;functions including detoxification, protein synthesis, and production of biochemicals necessary for digestion
gallbladder small,muscular,sac locacated under the liver and attached to it by conective tissue
rectum is the final six to eight inches of the larges instines and is a storages area for indigestible and wastes
large intestine the final section of the alimentrary canal,Its function is to absorb water from the remaining indigestible food matter, and then to pass useless waste material from the body.
colon last part of the digestive system;it extracts water and salt from solid wastes before they are eliminated from the body,absorb water, potassium and some fat soluble vitamins
vermiform appendix contains a small projection,blind-ended tube connected to the cecum from which it develops embryologically.
jejunum eight feet on length and forms the middle section of the small intestine
duodenum first nine to ten inches of the small intestine.bile fromthe gallbladder and liverand parcreatic juice enter this section through ducts or tube
ileum final section of the small intestine,the fuction is absorb vitamin B12 and bile salts and whatever products of digestion were not absorbed by the jejunum.
villi come out from the wall of the small intestine and have additional extensions called microvilli, increases the surface area so there are more places for food to be absorbed.
hard palate thin horizontal bony plate of the skull, located in the roof of the mouth. It spans the arch formed by the upper teeth.
Created by: judith_2