12. In what direction does blood flow through the heart? A. Up and down
B. Right to left
C. Slow then fast
D. Fast then slow

Cedric has a low fever and minor aches. yesterday, he went to the doctor for his booster shot and receive the flu shot. which best explains why he has this reaction?

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.