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Function of digestive system is to
break down food - carbohydrates, protein, fats
The process of breaking down food into smaller substance.
5 activities of digestions:
Ingestion - taking food into the body
Peristalsis - movement of food to digestive tract
Digestion - breakdown of food
Absorption - from digestive tract to the cells
Defecation - elimination of food
Long continuous tube from mouth to anus.
Gastrointestinal tract OR Alimentary canal
Organs of gastrointestinal tract OR alimentary canal
- small intestine
- large intestine
Accessory organs of gastrointestinal tract OR alimentary canal
- salivary glands
Layers of gastrointestinal tract OR alimentary canal
coats OR tunics
4 Layers of gastrointestinal tract OR alimentary canal. (from inside out)
- Tunica Mucosa
- Tunica Submucosa
- Tunica Muscularis
- Tunica Serosa (adventitia)
Mouth OR oral cavity aka
Oral Cavity functions:
Mechanical breakdown of food using teeth
Chemical breakdown of food using saliva - enzyme amylase
Under the tongue symmetrical division called
Found in front of the tongue, rough and for leaking.
Found towards the back of the tongue, for taste buds.
- fungiform papillae
- circumvallate papillae
The major portion of saliva is secreted by_____.
Salivary glands are:
- Parotid gland
- Submandibular gland (OR submaxillary gland)
- Sublingual gland
Enzyme breaks down carbohydrates like starch
There are _____ temporary teeth or DECIDUOUS teeth in infants.
There are _____ permanent teeth in adult.
The 8 front teeth called ____. They are used to CUT food.
The 4 _____ teeth are used to tear food. They are aka CUSPIDS - 1 cusp.
The ____ teeth used to grind food.
Caused by virus, infects salivary glands. Swelling of salivary glands under the chin.
A tooth portion above the gums called ____
A tooth hard substance that protect the tooth from wear & acid called____.
A tooth embedded in the socket called ___.
A tooth made of ____. Enclosed the pulp - delicate tissue.
Base of the tooth, which blood vessels and nerves enter the tooth called _____.
Is part of digestive system & repiratory system. Passageway of food and air. It's function is use for swallowing.
It is a mass of food
Stomach cells & secretes:
Zymogenic OR Chief cells - enzyme Pepsinogen
Parietal cells - hydrochloric acid, activates Pepsinogen to become Pepsin; Pepsin - breaks down protein.
Mucous cells - secrete mucus; protect stomach from being digested.
Pancreas cells & secretes:
alpha cell - secrete hormone Glucagon
beta cell - secrete hormone Insulin
This called when hydrocloric acid & digestive enzymes wore out the layer of stomach. May caused excessive production of acid.
The largest organ of digestive system.
Liver divided into 2 lobes. What are those?
Liver is separated into two lobes Right lobe & Left lobe by _____.
It's function is to store bile produced by the liver.
Absorption occur in ____. Absorption of nutrients like sugar, amino acid, fatty acid, water, vitamins & mineral.
The digested, semifluid contents in the small intestine
Folds of the intestine
Absorption of water occurs in _____. Refered to as Bowel.
Is the inflammation of the liver caused by excessive alcohol consumption.
Is caused by Hepatitis_A_virus (HAV). Contact with contaminated water & food.
Is caused by Hepatitis_B_virus (HBV). Transmitted by contaminated by blood transfusion, needles or sexual contacts with an infected partner.
Is a long degenerative disease of the liver.
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