Physiology 2130 Lecture Notes - Lecture 9: Vascular Resistance, Smooth Muscle Tissue, Theca Interna
8 Dec 2016
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Module #9 circulatory system ii: blood vessels (sections 9. 1 to 9. 46) Learning objectives: describe and explain the general organization and anatomy of the cardiovascular system, including the heart and blood vessels. The circulatory system is a closed system of tubes (blood vessels) filled with fluid (blood) that is moved around by a central pump (heart). The arteries and arterioles transport blood away from the heart, capillaries where gas exchange takes place, and the venules and veins that return blood back to the heart. The large arteries branch into smaller arteries and then arterioles. Arterioles branch to the capillaries. the capillaries converge into small venules which get larger to form veins. There are two principal loops that the blood takes through the body. One loop, called the pulmonary circulation beings on the right side of the heart and send blood through arteries to the lungs. These blood vessels continually branch into smaller blood vessels, which eventually become capillaries.
