Biology: Respiratory and Circulatory Systems

Front

Capillaries

Back

Any of the tiny blood vessels normally connecting the smallest arteries (arterioles) with the smallest veins.

Front

Carbon Dioxide

Back

It is a gas, which is referred to as CO2. It is released from the body as waste.

Front

Diaphragm

Back

Helps you breathe and separates the lungs from your stomach and intestines.

Front

Oxygen

Back

It is a gas, which is referred to as O2. Oxygen is received by the body through respiration, also known as breathing.

Front

Cellular Respiration

Back

A chemical process that occurs in cells to convert food, like glucose, into energy.

Front

Respiratory System

Back

The system of organs involved in the exchange of carbon dioxide and oxygen between an organism and its environment.

Front

ATP (Adenosine triphosphate)

Back

A molecule that stores and transfers energy in cells, and is often called the cell's energy currency.

Front

Bronchus

Back

Any of the major air passageways of the lungs; especially, either of the two main branches of the trachea, or windpipe.

Front

Circulatory System

Back

The body's system of blood vessels and the heart that moves blood throughout the body.

Front

Alveolus

Back

A tiny sac in the lungs where the exchange of oxygen and carbon dioxide takes place.