Respiratory System and Diffusion

Which of the following is the best description for what can be seen in the picture?

• the heart and its arteries

• some alveoli surrounded by capillaries

• veins and arteries cut open

• lungs and blood

The smallest blood vessels in the picture are

• arteries

• alveoli

• bronchioles

• capillaries

Which of the following is the best description about the blood in the capillaries close to the alveoli?

• the blue blood arriving is oxygenated blood, the red blood leaving is deoxygenated blood

• the red blood arriving is oxygenated blood, the blue blood leaving is deoxygenated blood

• the blue blood arriving is deoxygenated blood, the red blood leaving is oxygenated blood

• the blood in the capillaries is not moving

The process that happens, to cause oxygen to move from the alveoli into the capillaries is called

In this diagram showing the gases diffusing in and out of the alveolus, which gas is moving out of the inhaled air?

• oxygen

• carbon dioxide

• nitrogen

• blood

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

In this diagram showing the gases diffusing in and out of the alveolus, which gas is moving out of the bloodstream?

• oxygen

• carbon dioxide

• nitrogen

• blood

Tags

NGSS.HS-LS2-5

Oxygen gas (O₂) moves into the blood capillary by

Which letter on the diagram shows an area where the concentration of oxygen would always be high?

• A

• B

• C

• D

Which letter on the diagram shows an area where the concentration of oxygen would always be lower?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-7

Carbon dioxide gas (CO₂) moves into the alveolus by