_____________ is the most superficial layer enclosing the heart.

The extrinsic pathway of blood clotting is activated by the _________.

An incompetent tricuspid valve may cause blood to back up into the _________.

Aorta, common carotid, and pulmonary trunk are considered ____________.

The P wave of the electrocardiogram is a signal from _________.

Which of the following brings edges of damaged vessel closer together?

The “intrinsic pathway” of coagulation is caused by ________, which in turn triggers the release of blood clotting factor 12 by _______.

The pressure of blood remaining in aorta during ventricular relaxation is close to ________.

(Refer to the diagram above FIG.2.) The interventricular septum is labelled __________. 

Elastic arteries function as a __________.