Attention to detail and timeliness are important skills for this. Also, one must be non-judgmental and impartial.
Answer:
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 ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.
If someone says do 5 reps of 20 push-ups yo do 20 push-ups then take a little break and do that 5 times
I'd say its overuse injury (muscle injury) but do you have choices to choose from?