Activity The image shows a cell in the process of digestion. Study the image, and then answer the questions that follow.

Part A
What are the strengths and limitations of this model?

How do we measure or think of speed in the united states?

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.