What are the bubbles that the elodea released made of?
Answer: Oxygen
Answer:
Villi, alveoli and nephrons are similar as :-
B. They provide large surface areas for molecular exchange.

In humans, the medulla region of the brain is mainly responsible for the regulation process of respiration. It is also called the respiratory rhythm centre. The chemosensitive area located near the respiratory centre sends signals across nerve impulses to alter the rate of expiration to eliminate compounds.
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