Blood Vessels ad Vascular Resistance Flashcards
What’s the relationship between blood flow and lateral diffusion
Higher the blood flow the lower the lateral diffusion
What are the factors affecting blood flow
Pressure difference between ends
Diameter of lumen
Length of tube
What happens to the blood flow if the resistance increases
Decreases
What happens to the blood flow if the pressure increases
Increase
What is blood flow affected by
Pressure and resistance
What is the main difference in the tunica media of elastic and muscular arteries
Elastic has more elastic fibre
Muscular has more smooth muscles
What type of artery is the A route of circulatory system
Muscular
What is the main type of artery
Elastic
What are the 3 type of arteries
Elastic
Muscular
Arterioles
Where are discontinuous capillaries found
Only in liver
What are the 3 types of capillaries
Fenestrated
Discontinuous
Continuous
What are capillaries made of
Endothelial
Is tunica externa thicker than the tunica media in arteries or veins
Veins: thicker
Arteries: thinner
What’s the tunica externa made of
Connective tissue sheath
What’s the thickest layer in arteries
Tunica media
What’s the tunica media made of
Concentric sheets of smooth muscles
Loose connective tissue
What’s the tunica interna made of
Single layer endothelial lining surrounded by thin layer of connective tissue
What are the 3 main layers in arteries and veins
Tunica: interna, media, externa
