Science 7 SE Revision 3

Blood consists of:

• the heart and the veins

• blood cells and arteries

• plasma and blood cells

These are types of blood cells:

• Red blood cells, platelets and white blood cells.

• Blue blood cells, purple blood cells and white blood cells.

• Platelets, arteries and red blood cells.

Which blood cells transport oxygen and carbon dioxide?

• Platelets

• Red blood cells

• White blood cells

Which blood cells repair damage to the body and stop you from bleeding?

• Platelets

• Red blood cells

• White blood cells

Which blood cells defend your body from microorganisms and viruses?

• Platelets

• Red blood cells

• White blood cells

The three types of blood vessels are:

• Veins, arteries and capillaries.

• Veins, hearts and alveoli.

• Arteries, plasma and cells.

What happens in diastole phase?

• The heart contracts and sends bloods to the arteries.

• The heart relaxes and blood enters from the veins.

In pulmonary circulation blood is taken from...

• the heart to the lungs, and back again.

• the heart to the rest of the body.

• the lungs to the rest of the body.

Where does the blood collect oxygen?

• From the trachea

• From the kidneys

• From the lungs

Blood carrying carbon dioxide enters the heart through the ...

• cava artery

• vena cava

• aorta