Body System Basics
Organs and Their Job
Cells and Body Defense
Movement and Control
Building Blocks of Life
100

This system takes in oxygen and removes carbon dioxide from the body.

What is the respiratory system?

100

This organ pumps blood throughout the body.

What is the heart?

100

These cells carry oxygen through the blood.

What are red blood cells?

100

This system works with bones to help you move.

What is the muscular system?

100

A group of similar cells that work together to do one job.

What is tissue?

200

This system moves blood through the body.

What is the circulatory system?

200

This organ helps your body take in oxygen.

What are the lungs?

200

These cells help fight infections and germs.

What are white blood cells?

200

This system sends messages between the brain and body.

What is the nervous system?

200

A group of tissues working together to perform a specific function.

What is an organ?

300

This system breaks down food into nutrients

What is the digestive system?

300

This organ helps break down food using acids and muscles.

What is the stomach?

300

The system that produces hormones to control growth and other functions.

What is the endocrine system?

300

These soft tissues contract and relax to move parts of the body.

What are muscles?

300

This system covers and protects the body, including skin, hair, and nails.

What is the integumentary system?

400

This system removes waste from the body.

What is the excretory system?

400

This organ controls your body and helps you think.

What is the brain?

400

Special cells used in reproduction, such as sperm and eggs.

What are gametes?

400

This system gives the body support and structure.

What is the skeletal system?

400

The process of creating offspring or new life.

What is reproduction?

500

This system helps fight off germs and diseases.

What is the immune system?

500

This organ is the body’s largest organ and protects you from germs.

What is the skin?

500

This system protects the body from harmful invaders.

What is the immune system?

500

The brain and spinal cord are part of this system.

What is the nervous system?

500

The smallest unit of life in all living things.

What is a cell? (bonus question)