Write 4-5 sentences explaining how the respiratory system is cardiovascular system works together?

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

Gene expression is the activation of a gent that results in a question 1 options: protein dna mitochondria

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?