Smooth Muscle, Elastic Fibers
The Tunica Media consists mostly of _____ ____, but in large arteries it also contains _____ _____.
The Tunica Media is innervated by the _____ ANS, which causes vasoconstriction and vasodilation.
Areolar, elastic, collagen
The Tunica Externa consists mostly of ____ CT, and some ____ and ____ fibers.
A ___ ____ is a small blood vessel that supplys a large blood vessel when its wall is too thick to pass oxygen and nutrients.
Elastic, Muscular, Arterioles
The 3 types of arteries are ____ arteries, _____ arteries, and _____
____ _____ are the largest type of artery. They are closest to the heart and are under the highest pressure.
This is a picture of an ____ _____, notice the thick tunica media, strung with alot of additional fibers.
This is an example of a ___ ____, notice the narrow bands of elastic fibers on either side of the tunica media
Internal Elastic Lamina
This elastic band around the inside of the tunica media is called the _____ _____ ___
External Elastic Lamina
This elastic band aound the outside of the tunica media is called the _____ ____ ___
This is an example of an _____, the smallest of the three artery types. Notice the relatively thin muscle layer (usually 1-6 cell layers)
Continous, Fenestrated, Sinusoids
The three types of continous capillaries are _____ capillaries, _____ capillaries, and ______.
Continous capillaries use ______, a vesicular transport, for things that dont diffuse through the endothelium
A fenestrated capillary has fenestra "windows" to allow for increased ___ and ____ transport.
Endocrine Glands, Intestines, Kidneys
Fenestrated capillaries are found in ____ ___, _____, and the ______.
The type of capillary pictured is a _____. (notice the large gaps between endothelial cells)
The sinusoid is differnt from a fenestrated capillary because of its _____ basement membrane
Sinusoids allow for the transport of large materials such as _____, and large ______.
Veins contain semilunar valves because blood is not under sufficent ______ to overcome gravity.