Lesson 1.2 (A) Circulatory System

The heart, blood vessels and blood are components of the _______ system.

• Renal

• Respiratory

• Oxygen

• Circulatory

One of the main functions of blood is to transport oxygen and nutrients to body cells.

• True

• False

One of the main waste products that the circulatory system helps in removing is:

• CO2

• CO

• O2

• O3

Arteries carry ______ blood.

• oxygenated

• deoxygenated

Veins carry blood from the _______ to the ________ .

• Heart to the body

• Body to the heart

Arteries, veins and capillaries are examples of blood vessels.

• True

• False

Capillaries are the smallest blood vessels in the human body.

• True

• False

The circuit where the blood goes from the heart to the lungs and back is called:

• Pulmonary Circuit

• Systemic Circuit

The systemic circuit returns ________ blood from the body to the heart.

• Oxygenated

• Deoxygenated

Hemoglobin in red blood cells carries the oxygen molecules.

• True

• False