Human Body Systems

The atria (atrium) are the upper chamber. The lower chambers are the __.

What is the main function of the circulatory system? Choose the best answer.

The tube that allows air into your lungs

Another word for making an educated guess or a prediction is:

This is a diagram of the

The diaphragm relaxes to give room to the lungs to fill with air. This is called __.

This is a diagram of the

The brain controls the nervous system. __________ carry messages from your brain to the rest of the body.

The last thing you should do when following the scientific method is:

Which one of these is a voluntary muscle?

Which of the following is not a part circulatory system?

This is a diagram of the

Enzymes help break down food. Enzymes are found in your ___.

What is the gland in your brain that signals puberty?

Select all smooth muscles

What organ removes waste from your blood?

Which part of the respiratory system delivers the oxygen to be absorbed into your blood? (oxygen and CO2 are exchanged)

As the diaphragm contracts, we breathe out____.

The heart is the strongest muscle in your body. How many chambers does your heart have?

These tubes carry blood to your heart

When we breathe in our lungs fill with ___.

The first thing you should do when following the scientific method is:

What does the digestive system do?

The digestive process starts in the ___.

Where do waste products and food that are not absorbed in the small intestine pass to next?

Which chamber of the heart does deoxygentated blood enter through?

We breathe out CO2 and breathe in oxygen. What recycles carbon dioxide into clean oxygen?