Answer:
The answer should be B
Explanation:
The nucleus has the genetic code to make protein.
<span>nerve cells need b 12 for proper functioning</span>
Answer:
Moistening food and helping to create a food bolus so food can be swallowed easily
Answer: respiratory system
Explanation:
The respiratory system is the network of organs and tissues that help you breathe. It includes your airways, lungs and blood vessels. The muscles that power your lungs are also part of the respiratory system. These parts work together to move oxygen throughout the body and clean out waste gases like carbon dioxide