Under The Microscope: Lesson 1

Front

Cell

Back

The basic building block of life—all living things are made up of one or more cells.

Front

Circulatory System

Back

A body system composed of organs, such as the heart and blood vessels, that transports essential nutrients, gases, and chemicals around the body.

Front

Digestive System

Back

A body system composed of organs, such as the stomach and large intestine, that breaks down food to extract nutrients, absorb them into the bloodstream, and excrete unused solids from the body as waste.

Front

Excretory System

Back

A body system composed of organs, such as the bladder and kidneys, that filters waste products from the body and excretes these from the body as urine.

Front

Function

Back

The purpose, role, or job of a person or thing.

Front

Muscular System

Back

A body system composed of muscles that allows for movement, retains posture, and helps circulate blood.

Front

Nervous System

Back

A network of nerve cells in the body that gathers information and helps body parts communicate with each other, organized into two main parts—the central nervous system, which includes the spinal cord and brain, and the peripheral nervous system, which is found in our organs and limbs.

Front

Organ

Back

A body structure that performs a specialized function (such as the lungs, heart, liver, or kidneys) and may have smaller structures within it (such as the lens, cornea, and retina in the eye).

Front

Respiratory System

Back

A body system composed of organs, including the lungs, that allows for breathing and gas exchange.

Front

Skeletal System

Back

A body system composed of bones and joints that supports and protects the body, produces blood, stores minerals, and allows for movement.