Answer:
D) four.
Explanation:
The two atria hold the blood that circulates away from the heart. The heart has four one-way valves, which open and close with each heartbeat. The tricuspid valve and the mitral valve are located between the atria and allow the blood to flow from the atria to the ventricles. Also you don't have to but mind marking Brainliest?
The answer is sexual activity.
I hope this helps!
The correct answer is B I’m 100% because i had that question before
<span>Cover. Wear a hat or other protective covering to prevent body heat from escaping from your head, face and neck. ...Overexertion. Avoid activities that would cause you to sweat a lot. ...Layers. Wear loosefitting, layered, lightweight clothing. ...<span>Dry. Stay as dry as possible.</span></span>
