Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
I believe it’s C but I’m not sure .
I've had this question before and the answer is D) 30 minutes per day, 5 days a week
B
If a family member has a mental illness, a person is more susceptible To having a mental illness
