Im like 98% sure its B because ultra sounds hear the frequency's of the baby in the womb
Answer: false
Explanation:
invertebrates and vertebrates are two classes of animal.
Answer:
The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell. When oxygen passes into the bloodstream, carbon dioxide leaves it.
Explanation:
The answer is C i just did this
