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Blood Vessels - Overview
Structure and Types of Blood Vessels Unit 7 Lecture 3
The layers of the blood vessels are continuations of the layers of the ____.
The inner most layer of a blood vessel is called ____ ____
What is the one layer found in all blood vessels?
Endothelium, Areolar CT
What two tissues is the Tunica Intima made up of?
What is the middle layer of a blood vessel?
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.
What is the outer most layer of blood vessels?
The ____ _____ anchors the blood vessel to other sturctures.
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.
_____ carry blood AWAY from the heart
Are artery walls thick or thin when compared to veins of the same size?
Which layer is usually the thickest in an artery wall?
Arteries contain more ____ and _____ fibers than veins.
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.
The Aorta is an example of what type of artery?
This is an example of a ___ ____, notice the narrow bands of elastic fibers on either side of the tunica media
Of the three artery types, the ____ arteries are the medium sized ones.
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 _____ ____ ___
The femoral artery is an example of which type of artery?
This is an example of an _____, the smallest of the three artery types. Notice the relatively thin muscle layer (usually 1-6 cell layers)
The function of the arteriole is to carry blood to the ____.
What are the smallest blood vessels?
A network of capillaries is called a ____ ____
Continous, Fenestrated, Sinusoids
The three types of continous capillaries are _____ capillaries, _____ capillaries, and ______.
The most common capillary is the ____ ____.
It is called a continous capillary because of its continous ______ (no openings)
Continous capillaries use ______, a vesicular transport, for things that dont diffuse through the endothelium
This is a picture of a _____ _____. (notice the "windows" in its 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 ______.
Bone Marrow, Liver, Spleen
Sinuosoids are found in _____ _____, the _____, and the _____.
____ carry blood TOWARD the heart
Veins have relativly ___ walls and ____ lumin, compared to arteries of the same size.
Which layer of the wall is usually thickest in a vein?
What are the two types of veins?
This is a _____(notice its small size, no valves are present)
Are venules large or small when compared to veins?
These are both ____ (notice the large sizes and the presence of valves)
Veins contain semilunar valves because blood is not under sufficent ______ to overcome gravity.
Approximatly 2/3 of the body's blood is found in the _____, and _____