The answer is the epiglottis
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?
As for question number 7 this is how you can be cool take it from someone who has had a personal experience with trying to be cool well for one just be your self and others can accept you for who you are or not accept you but at the end of the day you’re going to be worrying about trying to be cool and the people you tryna be cool for going to still be living there life not worried I pray this helps .