Label the organs in the circulatory system.

Match the organs with their function
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Heart | arrow_right_alt | They take the oxygen we need to live. |
Lungs | arrow_right_alt | They return blood to the heart. This blood is darker (usually look blue) because they have low oxygen. |
Arteries | arrow_right_alt | It is a hard working muscle that pumps blood to every part of the body. |
Veins | arrow_right_alt | They carry bright red blood full of oxygen from the heart to all the parts of the body. |
What are the three main types of blood vessels in the circulatory system?
What gives blood its red color?
What is the function of white blood cells in the body?
What causes the "lub dub" sound of the heart?
Label the organs in the respiratory system.

The help us .
When we breathe in, we take in the our body needs from the air.
When we breathe out, we expel the that our body does not need.
The is a big muscle that helps us breathe.
How do we breathe? Put the steps in order.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Oxygen from the air passes into the circulatory system and the blood carries it to all parts of the body. | arrow_right_alt | Step 1 |
We breathe out carbon dioxide through our nose and mouth. | arrow_right_alt | Step 2 |
The air enters the lungs. | arrow_right_alt | Step 3 |
We breathe in through our nose and mouth | arrow_right_alt | Step 4 |