Red blood cells . A: are only found in arteries
B: are made mostly of water
C: fight disease
D: carry oxygen

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

Autonomous underwater explorers will be used to gather large-scale ocean information select the best answer from the choices provided ot

When sodium chloride dissolves in water, the sodium chloride dissociates into a. na- ions. b. cl+ ions. c. nacl ions. d. sodium chloride ions.