Describe the pericardium and distinguish between the fibrous and the serous pericardia relative to histological structure and location. Trace one drop of blood from the time it enters the right atrium...

Describe the pericardium and distinguish between the fibrous and the serous pericardia relative to histological structure and location.

Trace one drop of blood from the time it enters the right atrium until it enters the left atrium. What is this circuit called?

(a) Describe how heart contraction and relaxation influence coronary blood flow.

(b) Name the major branches of the coronary arteries, and note the heart regions served by each.