Cells of the same type work together to form this.

Your body's cells need this to work.

The muscle that pumps blood through your blood vessels to all parts of your body.

The system that has parts that send and receive messages from all parts of the body.

A tube that connects your mouth with your stomach.

Tissues of different kinds work together to form these.

The main organs of the respiratory system.

The system that includes your heart and all of your blood vessels.

The parts that deliver information to and from the brain.

A bag made up of smooth muscles where the food mixes with digestive juices.

You control this type of muscles by thinking.

When you breathe out, You get rid of this gas.

The blood vessels that branch out to all parts of your body.

The tube of nerves that runs through your backbone.

A long tube of muscle that does more work than any other part of the digestive system.

This type of muscle helps organs inside your body to their jobs.

This divides to form a system of tubes in your lungs.

The name for arteries when they become smaller and carry blood to every cell in your body.

The control center of your nervous system.

The last part of the digestive system.

This type of muscle works automatically - without you thinking about it.

The tubes of the trachea get smaller and smaller until they end in these.

The large blood vessels that return the blood to your heart.

The nervous system is made up of these individual nerve cells that transmit information.

It provides nutrients to all the body's systems.