These blood vessels carry blood back to the heart.

These blood vessels carry blood away from the heart.

These tiny blood vessels connect the smallest arteries to the smallest veins.

These cells fight germs and infections in our body.

These cells help to stop bleeding.

These cells absorb oxygen in the lungs and transport it to the organs and muscles.

This contains liquid plasma and three types of cells.

It is an organ that acts like a pump.

When these parts contract, they push the blood out of the heart.

This part divides the heart into two sides: right and left.

Heart is protected by _____________

The heart pumps blood to the lungs to get_________

The heart pumps the ___________ blood to the rest of the body.

When we breathe in (inhale), the intercostal muscles _______________ and the diaphragm pulls down, making the chest expand.

The intercostal muscles and diaphragm then___________and the air is pushed out of the lungs (exhale) as the ribcage falls downward and inhale.

______________________carries oxygenated blood away from the heart

___________________enable exchange of oxygen with body

_____________________carries blood from capillaries back to the heart to be pumped to the lungs to be re-oxygenated.

What is the main function of the heart?

Name the three types of blood vessels.

How many chambers are in the heart?

What is the job of the valves in the heart?

Which image is correct?