Answer:
Gas exchange
Explanation:
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Saturn is the new best planet they changed it from Jupiter to Saturn
The answer is the letter B. Electrical signals.
*Our brain and body communicates with each other by sending messages in the form of electrical signals.
A, scientists had to convert information from amino acids to nucleic acids.
<span>the pelvic colon, rectum, and bladder
</span>
