PTS GRADE 5

What do we call the tiny tubes that carry blood away from the heart?

• valves

• arteries

• atria

• bones

What do we call the tiny tubes that return oxygen

poor blood back to the heart?

• arteries

• chambers

• veins

• ventricles

What do we call the smallest blood vessels in our bodies?

• atoms

• capillaries

• tissues

• cells

The part of the blood that helps you stop bleeding when you cut yourself is called __________.

• red blood cells

• platelets

• plasma

• white blood cells

The part of the blood that fights off harmful bacteria and viruses is called ________.

• red blood cells

• white blood cells

• platelets

• plasma

The large artery that brings blood from the heart to the lungs is called the ___________.

• vein

• ventricle

• pulmonary artery

• capillary

Your lungs have tiny air sacs called _______.

• aorta

• arteries

• ventricles

• alveoli

This process is called...

• Inhalation

• Renovation

• Gas exchange

• Exhalation

Blood flows through blood vessels A to D as shown.

Which blood vessels transport blood richer in oxygen?

• A and B only

• A and D only

• B and C only

• C and D only

What is the function of the hair in our nostrils?

A. To trap dust and other pollutants in the air that we breathe in and prevent them from entering our lungs.

B. To prevent germs from entering our lungs.

C. To take in more oxygen for the lungs.

D. To warm the air that we breathe in.

• A

• A and B

• C and D

• A, B and D