Pretty confident that it is A, judging by that the word composition is used as a combination or a ratio of 2 things. Also none of the other options make sense.
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?
Answer:
Inform the original user of the needle about the needlestick injury - if they are known. They will be asked to consent to blood tests to check their HIV, HBV and HCV status.
Explanation:
Hopefully this helps :)
