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Food Into Fuel: The Circulatory System

Related Article: Learn more about the heart.

The nutrients in the digested food are absorbed through the wall of the small intestine.

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Digestive System: Forms of Digestion (0:27)

Digestion includes mechanical and chemical digestion.

Digestive System: Mouth (1:08)

Both mechanical and chemical digestion take place in the mouth.

Digestive System: Stomach (1:33)

Both mechanical and chemical digestion take place in the stomach.

Digestive System: Small Intestine (2:15)

Chemical digestion breaks food down into its simplest forms.

Digestive System: Large Intestine (0:58)

During digestion water is reabsorbed into the large intestine.

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Food Into Fuel: Review of the Digestive System (2:43)

This segment reviews the basics of nutrients and digestion.

Food Into Fuel: The Parts of the Human Digestive System (0:51)

Digestion occurs in the digestive system, which has many parts. These parts form a long tube called the alimentary canal.

Food Into Fuel: What Our Bodies Need to Stay Healthy (2:55)

The food that we eat must be broken down into very small pieces for our cells to use. Nutrients are chemicals that our bodies need. Digestion breaks down the complex molecules into more simple molecules that the body can use.

Food Into Fuel: Cells Make Up the Human Body (0:46)

The human body is made up of cells. Muscle cells, brain cells and all other cells require energy.

Food Into Fuel: Introduction to the Digestive System (1:17)

All human activities require energy, which comes from food. Food also supplies raw materials for growth and repair.

Investigating Human Biology: Food and Digestion (8:53)

Get a close-up look at the digestive process in this investigation of the human digestive system.

The Digestive System: Video Quiz (3:59)

This clip is a video quiz about the digestive system.

The Digestive System: Maintaining a Healthy Body (1:54)

Eating a balanced diet and exercising will keep a person healthy.

Food Into Fuel: Liquid and Solid Waste (2:33)

The large intestine absorbs lots of water from the digested food. All of the remaining material that the body can't use is waste. The waste collects and is eliminated as feces.

Food Into Fuel: The Circulatory System (2:43)

The nutrients in the digested food are absorbed through the wall of the small intestine.