Managing Mateiral

It is called the _________________________, and it includes the cardiovascular system and the lymphatic system

• circulatory system

• respiratory system

The main structure of the circulatory system is the ______________.

• veins

• heart

The ____________ is often called the “river of life.”

• blood

• blood vessels

What type of blood vessel carries blood towards the heart?

• Vein

• Artery

• Capillary

• Tube

Which two body systems interact to carry out gas exchange?

• Digestive and Respiratory

• Circulatory and Muscular

• Circulatory and Respiratory

• Muscular and Skeletal

Where does gas exchange occur in the lungs?

• Bronchi

• Trachea

• Pharynx

• Alveoli

Arteries carry (almost always) oxygenated blood

• Towards the heart

• Towards the lungs

• Away from the heart

• Away from the lungs

Why are capillaries important to the circulatory system?

• The breakdown of food into usable nutrients occurs there

• The movement of muscles to perform locomotion occurs there

• The exchange of materials between the blood and body cells occurs there

• The pumping of blood occurs there

How many chambers does the human heart have?

• 3

• 4

• 2

• 1

The small blood vessels where exchange of O₂ and CO₂ occurs are called...

• arteries

• capillaries

• veins

• heart