Lecture 6 Arteries and veins Flashcards
Three layers of blood vessels
Tunica intima, Tunica media and tunica adventitia
In the tunica intima, the endothelium is made up of ____________
Simple squamous epithelium which lines the lumen of all vessels
The sub-endothelium in the tunica intima is made up of _________
A sparse pad of loose FCT cushioning the endothelium
The internal elastic lamin of the tunica intima is made of ____________
A condensed sheet of elastic tissue. It is well developed in arteries and less developed in veins.
The tunica media is made up ________
Smooth muscle. It is a variable content of connective tissue fibres, mainly elastin and collagen.
The thickness of the media is _______ to both the vessel _______ and ______ pressure
Proportional, diameter, blood
The tunica adventitia is made up of __________ with a high content of ______ and variable amount of _______
Loose FCT, collagen, elastin
In larger vessels, the adventitia contains the _________
Vasa vasorum.
The tunica adventitia also contains
A. Lymphatics and autonomic nerves
B. Deoxygenated blood
C. Pseudostratified columnar epithelial cells
A
Veins have ____ pressure and a _____ volume transport system.
Low, large
Veins have a _________flow
unidirectional (one-way)
Veins are __________ vessels
capacitance
Which one of these statements is true
A. The intima is the outermost layer of the vein
B. The media of the vein is thicker than arteries.
C. The media in veins is made up of skeletal muscle
D. The adventitia is often the thickest layer of the vein
D
What cells are most common in the tunica media? A. Endothelial cells B. Smooth muscle C. Skeletal muscle D. Fibroblasts
B
The tunica intima is composed of?
Elastin
