Answer:
At the beginning of the follicular phase, the lining of the uterus (endometrium) is thick with fluids and nutrients designed to nourish an embryo. If no egg has been fertilized, estrogen and progesterone levels are low. As a result, the top layers of the endometrium are shed, and menstrual bleeding occurs.
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It is B and I know it because I am in college and I already know about this question so your welcome for helping put
The blood get it's greatest pressure from the heart. The heart pumps the blood out.
Answer:
Decrease in carbon dioxide because they take in carbon dioxide for photosyenthesis process
Explanation:
