Overview of the Human Digestive System

Mouth

The entry point of the digestive system where mechanical digestion (chewing) and chemical digestion (saliva) begin.

Esophagus

A muscular tube that connects the throat to the stomach and moves food using peristalsis.

Peristalsis

Wave-like muscle contractions that move food through the digestive tract.

Stomach

A muscular organ where food is mixed with gastric juices; protein digestion begins here.

Small Intestine

The site of most digestion and nutrient absorption; consists of the duodenum, jejunum, and ileum.

Large Intestine (Colon)

Absorbs water and electrolytes; forms and stores feces.

Liver

Produces bile, which helps digest fats; also processes nutrients and detoxifies substances.

Bile

A substance produced by the liver that emulsifies fats for digestion.

Gallbladder

Stores and releases bile into the small intestine.

Pancreas

Produces digestive enzymes and bicarbonate to neutralize stomach acid in the small intestine.

Amylase

An enzyme that breaks down carbohydrates; found in saliva and pancreatic juice.

Rectum

The final section of the large intestine, where feces are stored before being expelled.

Anus

The opening at the end of the digestive tract where solid waste leaves the body.

Mechanical Digestion

Physical breakdown of food (e.g., chewing, stomach churning).

Chemical Digestion

Breakdown of food by enzymes and chemicals.

Absorption

The process by which nutrients pass from the digestive system into the bloodstream or lymph.

What are the Accesory Digestive Organs

Salivary Glands, Teeth, pancreas, liver, gallbladder

What is the difference between the  Alimentary Canal and the Accessory digestive organs.

Digested food comes out the Alimentary and non-digested food comes out the accessory digestive organs. 

What is 1 as labeled

mouth

What is 2 as labeled

Salivary Glands

What is 3 as labeled

Tongue

What is 4 as labeled

Pharnyx

What is 5 as labeled

Esophagus

What is 6 as labeled

Stomach

What is 7 as labeled

Small Intestine

What is 8 as labeled

Large Intestine

What is 9 as labeled

Anus

What is 10 as labeled

liver

What is 11 as Labeled

Gallbladder

What is 12 as Labeled

Pancreas

What is defecation?

Defecation is the process of eliminating waste from the digestive tract through the anus.

What is ingestion?

is the process of taking in food and liquids into the body through the mouth.

Secretion

digestive organs release enzymes and acids

propulsion

is the movement of food through the digestive tract