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32 Cards in this Set

  • Front
  • Back

Functions of Digestive System?

-breakdown foods and nutrients


- absorb nutrient


-absorb water


-secrete wastes

Start of digestion?

Mouth

Breaking down food into smaller particles by chewing, grinding and cutting

Teeth

A liquid producrd by the Salivary Glands

Saliva

It has chemical receptoes sensitive to the chemical composition and specific tastes of food

Tongue

Tongue's 5 different tastes

Sweet


Sour


Bitter


Salyu


Umami

Flap of tissue that covers the trachea

Epiglottis

Tube that connects mouth and stomach; it is a passageway

Esophagus

The rhythmic contraction of the gut muscles that propels materials along the length of the digestive tract

Peristalsis

Acid digestion occurs in the stomach

Stomach

Stomach releases two types of acid

Gastrin and Pepsin

A hormone stimulates acid release

Gastrin

An enzyme that breaks up proteins, requires an acidic environment to become active

Pepsin

Causes pain when stomach is empty, these are bacterial infection that create ulcerations

Stomach ULCERS

Due to weakness in the sphincter muscle at the top of the stomach

Acid Reflux

Lined with millions of microvili

Small Intestine

The walls of small intestine is the site of?

Nutrient Absorption

It also occurs during nutrient reabsorption

Water reabsorption

Small intestine:


-Digestion of food starts

Duodenum

Small intestine:


-final chemical digestion and nutrient absorption takes place

Jejunum

Small Intestine:


-final absorption of digested foods

Ileum

Releases pancreatic juice,containing bicarbonate, lipases, proteases and amylase

Pancreas

Makes bile which emulsifies fats

Liver

Made from cholesterol which is made in the liver

Bile

Vastly increase the intestines surface area

Villi and Microvilli

Water from digested food is absorbed

Large Intestine

It is formed from fiber and other undigested material

Feces

Most Digestion occurs in

Small intestine

Why do we have microvilli

Because it increased the intestines surface area

Found in the stomach produced when food is present and signals the release of acid

Gastrin

Signals the release of soidum bicarbonate for the pancreas

Secretin

Recently discovered and control appetite

Ghrelin and Leptin