The respiratory system includes your nose, mouth, larynx, trachea, lungs, and diaphragm.

You breathe in carbon dioxide.

When you inhale, do you breathe in or out?

When you exhale, do you breathe in or out?

What protects your lungs?

Your rib cage is part of your ___________ system.

You can hold your breath until you pass out.

Which lung is BIGGER than the other?

Why is your left lung smaller?

The circulatory system ______________.

The heart is a muscle.

Which muscle is found in the heart?

The heart is about the size of your _______.

Arteries take blood _____________ your heart.

Veins take blood ___________ your heart

Arteries take blood from your heart to bring ___________ to your cells.

Where does the oxygen come from?

Digestion begins in your ___________.

The digestive system includes your mouth, esophagus, stomach, small intestine, and large intestine.

Your digestive system includes your _____________.

Your digestive system breaks down _______.

Your body's cells use the broken down food to make _________.

As you chew, _________ mixes with food and begins to break it down.

Your _________ muscles squeeze the food to break it into smaller pieces.

Next, the food moves to your _________________, where nutrients are absorbed into your blood stream.

Any food that was not absorbed moves on to your _________________.

What's another name for your large intestine?

Where does food ENTER your body?

How many bones are in an adult's body?

There are ___ types of muscles.

The three types of muscles are skeletal, smooth, and cardiac.

Voluntary muscles move without you thinking about them.

Skeletal muscles are voluntary.

What's an example of a skeletal muscle?

Cardiac muscle is found ________________.

Smooth muscle is found _______________.

Skeletal muscle is found ______________.

What attaches skeletal muscles to bones?

Lifting weights will make your muscles ______________.