6. What helps oxygen to be absorbed rapidly into the blood in the lungs?
A. Alr breathed in has less oxygen than air breathed out.
B. Alveoli have thick walls and a large surface area.
C. Alveoll have thin walls and a large surface area.
D. The concentration of oxygen in the blood is higher than in the alveoll.
Answers
Answered by
3
Answer:
Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.
Explanation:
ALVEOLI
Answered by
1
Answer:
C
Explanation:
Similar questions