Is composed of organs and glands working together to break down or digest the food to its building blocks or units
Digestive system
Forms of digestion
1.Mechanical Digestion
2.Chemical Digestion
Includes processes like chewing and cutting of food to break down into smaller pieces
Mechanical Digestion
Involves enzymes which chemically break down the food into simpler form
Chemical Digestion
Main part of the digestive system
Alimentary canal/digestive tract
The alimentary canal is about ___ feet long from mouth to anus
30
Digestion process begins here. It is the site of ingestion food
Mouth
The ______ helps in mixing the food with the saliva, and it pushes a ball called _____
Tongue, bolus
A flap of tissue called __________ automatically closes the trachea or the “air tube” when swallowing the bolus
Epiglottis
After swallowing, the epiglottis will go back to its ________ position allowing air to pass through the trachea
Original
After swallowing, bolus passes from the pharynx down to the _________, which is a tube leading to the stomach
Esophagus
From the esophagus, food moves into the _______. Is a J-shaped muscular organ, which stores food
Stomach
The stomach has a capacity of about ___ liters in adults
Two
Muscular contraction in the stomach causes the mixing of the food with gastric juices, forming a _____. It will pass through the pyloric sphincter to the small intestine
Chyme
What is the main purpose of the pyloric sphincter
Allowing chyme to pass to the small intestine
The small intestine is divided into three sections: ________, _______, and _____
duodenum, jejenum, and ileum
Is the longest part of the alimentary canal, which is about __ feet long
Small intestine, 23 feet
Will undergo complete digestion in the small intestine
Chyme
Middle part, main site for nutrient absorption, has many vili and microvili, a rich blood supply, and absorbs mutrients into the bloodstream
Jejenum
The last and longest part, helps in immune defense through lymphoid tissue, contains peyer’s patches-helps fight infection and passes undigested material to the large intestine
Ileum
Is the linings of the small intestine which has a finger-like projections which contain blood vessels that absorb nutrients
Villi
It is where undigested food and water pass through
Large Intestine
The large intestine is divided into three regions: ______, _____, and ______
Caecum, colon, and rectum
The largest organ in the body, produces bile
Liver