129k views
3 votes
Gas exchange of CO2 for oxygen occurs between capillaries and what structure in the lungs? A. Veins B. Alveoli C. Bronchioles D. Cilia

User Wollnyst
by
8.7k points

2 Answers

2 votes

Answer:

B: Alveoli.

Step-by-step explanation:

User Mslowiak
by
7.9k points
3 votes

ANSWER:

The correct option is B: Alveoli. Gas exchange of "carbon dioxide and oxygen" takes place in the "alveoli" of the lungs.

Step-by-step explanation:

  • Alveoli are present in the alveolar sacs located at the end of respiratory bronchioles. Alveoli have thin walls and look like bubbles in the sacs.
  • These also are in "direct contact" with the blood capillaries. This contact ensures that "oxygen" is released into the blood capillaries by the alveoli directly.
User Superjer
by
7.2k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.