What is #15? Screen Shot 2020-04-21 at 10.21.08 PM(5).png

What is the name of the pacemaker that sets the rate of the heartbeat in the heart and where is it located?

The innermost lining of the heart chambers is

Which leukocyte DOES NOT mature in the red bone marrow?

Where is the AV node located?

Which blood vessels have blood moving through them at high pressure?

What is #8? Screen Shot 2020-04-21 at 10.20.52 PM.png

The systemic circulation or circuit delivers ___________ blood to _____________, while the pulmonary circuit delivers deoxygenated blood to the ____________.

What fetal structure carries blood from the pulmonary trunk to the aorta (aortic arch)?

The ridges inside the atria of the heart are called ___________ ____________.