Blood volume. If you are tired and no blood is able to get to your body and you heart keeps going faster your heart is probably going to fail.
Answer:
i. believe the answer is cardiovascular endurance
Epidermis is the surface epithelium of the skin, overlying the dermis. dermis is the layer of skin that lies beneath the epidermis and above the subcutaneous layer.
Answer: I think it's D
Explanation: idk I just feel like it's right. If it's not don't come for me
The part that makes you yawn is the reticular
