Respiratory and Circulatory Systems

Arteries carry oxygen rich blood away from the heart.

• True

• False

Thin-walled vessels that allow for the exchange of O_{2 ,} CO₂, nutrients and wastes between blood cells or air sacs in the lungs

• Arteries
• Veins
• Capillaries

Carry blood away from heart; mostly oxygen-rich

• Arteries
• Veins
• Capillaries

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

During exercise you blood will contain.... and that is why you breath more rapidly.

• decreased number red blood cells

• increased level of oxygen

• increased level of carbon dioxide

• decreased level of iron iron

In the lungs, ________enters the blood from the capillaries.

• Nitrogen

• water

• carbon dioxide

• oxygen

Tags

NGSS.HS-LS2-3

The gas exchange in humans occurs in the

• nose

• trachea

• bronchiole tubes

• alveoli

Which tube carries oxygen to the lungs and known as the windpipe?

• esophogus

• epiglottis

• alveoli

• trachea

Which structure is indicated by the arrow? This structure contracts and relaxes causing changes in the chest cavity causing inhaling and exhaling.

• trachea

• lung

• bronchi

• diaphragm

Your pulse tells how fast your ___________ is beating.

• heart
• lungs