BIO-202: Human Anatomy and Physiology II Week 4.

The systemic circuit transports blood from the left side of the heart to the body and returns it to the right side.
The pulmonary circuit transports blood from the right side of the heart to the lungs and then back to the left side.
The coronary circuit supplies oxygenated blood to the heart for its metabolic demands.
Which of the following are the three tissue layers of arteries and veins?
from within to outside:
Interna Tunica
tunica externa tunica media

What exactly is the tunica interna?
the endothelium (simple squamous epithelium)
What is the tunica media made up of? What function does each component serve?
Smooth muscle – regulates artery diameter and contributes to tissue perfusion and blood pressure.