science fourth quarter prelims.

• mechanical phase-process of chewing or mastication.
• chemical phase-acted upon by chemical substance called enzymes.
• 2 main parts of organs digestions-alimentary tract and accesory glands
• mouth- where the food is swallowed and mix with saliva
• pharynx-also called as throat. passage way of digestion and respiration
• esophagus- muscular tube that connects the mouth to the stomach
• stomach- stores the swallowed food, mixes the food with digestive
• small intestine- largest organ in digestive system
• • 3 section of small intestine - duodenum,jejunum,illienum
• large intestine- absorbs water and electrolytes from food and produces feces
• rectum and anus- warehouse for undigested residue or feces
• 3 disinct parts of of large intestine- ascending colon, transvere colon, descending colon
• salivary glands- secrete saliva
• 3 types of salivary glands- parotid, submandibular, and sublingual
• liver- a largest organ of the body, produces bile, stores glycogen, and produces proteins
• gall bladder- where bile is temporarily stored and concentrated before being released into the small intestine
• 2 function of pancreas- exocrine glands, endocrine glands
• exocrine glands- consisting of berry like clusters is the pancreactic acini that secrete the digestive enzymes directly into duodenum
• enzymes- catalysts that speed up chemical reactions in the body