The Average Red Blood Cell Lives for About ________ Days

Q17: Earthworms have five contractive vessels that serve

Q18: Erythrocytes are produced in the:<br>A)bone marrow.<br>B)liver.<br>C)spleen.<br>D)heart.

Q19: Plasma that leaks from the capillaries into

Q20: Which of the following is delivered from

Q21: What happens to the speed of blood

Q23: What is the cardiac cycle?<br>A)the alternating relaxation

Q24: What is the advantage of a closed

Q25: The head of a giraffe is 5

Q26: A three-chambered heart:<br>A)is found in fish.<br>B)has two

Q27: What two organs are considered to be