Heart

Question 1

Blood vessel that carries blood back to the heart

Answer 1

vein

Question 2

smooth layer of cells lining the inside of the heart

Answer 2

endocardium

Question 3

valve between the right ventricle and pulmonary artery

Answer 3

pulmonary valve

Question 4

upper chamber of the heart

Answer 4

atrium

Question 5

valve between left ventricle and aorta

Answer 5

aortic valve

Question 6

muscular middle layer of the heart

Answer 6

myocardium

Question 7

blood cell that carries oxygen and carbon dioxide

Answer 7

erythrocyte

Question 8

brief period of rest in the heart

Answer 8

diastole

Question 9

double-layered membrane on the outside of the heart

Answer 9

pericardium

Question 10

blood vessel that connects arterioles with venules

Answer 10

capillary

Question 11

valve between the left atrium and left ventricle

Answer 11

mitral valve

Question 12

blood cell that helps fight infections

Answer 12

leukocyte

Question 13

blood cell required for the clotting process

Answer 13

thrombocyte

Question 14

blood vessel that carries blood away from the heart

Answer 14

artery

Question 15

period of ventricular contraction in the heart

Answer 15

systole

Question 16

muscular wall that separates the heart into a right side and a left side

Answer 16

septum

Question 17

complex protein on red blood cells

Answer 17

hemoglobin

Question 18

tissue that flows through the circulatory system

Answer 18

blood

Question 19

lower chamber of the heart

Answer 19

ventricle