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48 terms

Blood Vessels - Overview

Structure and Types of Blood Vessels Unit 7 Lecture 3
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Heart
The layers of the blood vessels are continuations of the layers of the ____.
Tunica Intima
The inner most layer of a blood vessel is called ____ ____
Tunica Intima
What is the one layer found in all blood vessels?
Endothelium, Areolar CT
What two tissues is the Tunica Intima made up of?
Tunica Media
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 _____ _____.
Sympathetic
The Tunica Media is innervated by the _____ ANS, which causes vasoconstriction and vasodilation.
Tunica Externa
What is the outer most layer of blood vessels?
Tunica Externa
The ____ _____ anchors the blood vessel to other sturctures.
Areolar, elastic, collagen
The Tunica Externa consists mostly of ____ CT, and some ____ and ____ fibers.
Vasa Vasorum
A ___ ____ is a small blood vessel that supplys a large blood vessel when its wall is too thick to pass oxygen and nutrients.
Arteries
_____ carry blood AWAY from the heart
Thick
Are artery walls thick or thin when compared to veins of the same size?
Tunica Media
Which layer is usually the thickest in an artery wall?
Collagen, elastic
Arteries contain more ____ and _____ fibers than veins.
Elastic, Muscular, Arterioles
The 3 types of arteries are ____ arteries, _____ arteries, and _____
Elastic Arteries
____ _____ are the largest type of artery. They are closest to the heart and are under the highest pressure.
Elastic Artery
This is a picture of an ____ _____, notice the thick tunica media, strung with alot of additional fibers.
Elastic Artery
The Aorta is an example of what type of artery?
Muscular Artery
This is an example of a ___ ____, notice the narrow bands of elastic fibers on either side of the tunica media
Muscular
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 _____ ____ ___
Muscular Artery
The femoral artery is an example of which type of artery?
Arteriole
This is an example of an _____, the smallest of the three artery types. Notice the relatively thin muscle layer (usually 1-6 cell layers)
Tissues
The function of the arteriole is to carry blood to the ____.
Capillaries
What are the smallest blood vessels?
Capillary Bed
A network of capillaries is called a ____ ____
Continous, Fenestrated, Sinusoids
The three types of continous capillaries are _____ capillaries, _____ capillaries, and ______.
Continous Capillary
The most common capillary is the ____ ____.
Endothelium
It is called a continous capillary because of its continous ______ (no openings)
Pinocytosis
Continous capillaries use ______, a vesicular transport, for things that dont diffuse through the endothelium
Fenestrated Capillary
This is a picture of a _____ _____. (notice the "windows" in its endothelium)
Fluid, protein
A fenestrated capillary has fenestra "windows" to allow for increased ___ and ____ transport.
Endocrine Glands, Intestines, Kidneys
Fenestrated capillaries are found in ____ ___, _____, and the ______.
Sinusoid
The type of capillary pictured is a _____. (notice the large gaps between endothelial cells)
Incomplete
The sinusoid is differnt from a fenestrated capillary because of its _____ basement membrane
Erythrocytes, Proteins
Sinusoids allow for the transport of large materials such as _____, and large ______.
Bone Marrow, Liver, Spleen
Sinuosoids are found in _____ _____, the _____, and the _____.
Veins
____ carry blood TOWARD the heart
Thin, Large
Veins have relativly ___ walls and ____ lumin, compared to arteries of the same size.
Tunica Externa
Which layer of the wall is usually thickest in a vein?
Venules, Veins
What are the two types of veins?
Venule
This is a _____(notice its small size, no valves are present)
small
Are venules large or small when compared to veins?
Veins
These are both ____ (notice the large sizes and the presence of valves)
Pressure
Veins contain semilunar valves because blood is not under sufficent ______ to overcome gravity.
Liver, Veins
Approximatly 2/3 of the body's blood is found in the _____, and _____