Because their bodies tell them that they need more oxygen and so breathe faster, and try and get the oxygen their body requires and depends on.
Hello,
I believe it's the C. capillaries because theirs no possible way for arteries to travel in Arteries are connected to the heart to let gallons of oxygenated and not oxygenated blood to travel up and down through your body.
Answer:
Estrogen levels days prior to ovulation
Explanation:
Estrogen is responsible for the reproductive system in women and high levels occur naturally during menstruation as compared to glucose levels in blood as the pancreas is constantly producing more insulin to lower the glucose in blood.
Answer:
eukaryotic cell
Explanation:
because prokaryotic cells lack nucleus
