Cells & Systems

Digestive System

Your body's food processing factory that breaks down food into fuel.

Peristalsis

Muscle waves that help food slide down the esophagus.

Alveoli

Tiny air sacs in the lungs where gas exchange occurs.

Diffusion

The process by which oxygen moves into blood and carbon dioxide moves out.

Circulatory System

The body's delivery network responsible for transporting blood and nutrients.

Nervous System

The communication system that sends and receives messages quickly.

Hypothalamus

The part of the brain that keeps body temperature stable.

Urea

Less harmful waste product created by liver from ammonia.

Neurons

Nerve cells that transmit messages throughout the body.

High blood pressure (hypertension)

A circulatory problem caused by smoking and poor diet.