What I know Directions: Read carefully each item. Use a separate sheet of paper for your answers. Write the letter of the best answer for each question. 1. Your body couldn't breathe without this system. Which one is it? A. Perspiration System C.Photosynthesis B. Respiratory system D. Urinary system 2. At what structure in the lungs does the exchange of oxygen and carbon dioxide takes place? A. alveoli C. bronchioles B. bronchi D. trachea
Add an Answer
More Questions From This User See All
Answers & Comments
Answer:
1.B.
2.A
Explanation:
1.The respiratory system is the network of organs and tissues that help you breathe. It includes your airways, lungs and blood vessels.
2.ALVEOLI are the very small air sacs where the exchange of oxygen and carbon dioxide takes place. CAPILLARIES are blood vessels in the walls of the alveoli. Blood passes through the capillaries, entering through your PULMONARY ARTERY and leaving via your PULMONARY VEIN.
Hope it helps.
Keep on learning!
Answer:
1c
2b
Explanation:
mark me as the brainliest answer