Cardiovascular

Question 1

Differentiate b/w macrovascular & microvascular w/ e.g.

Answer 1

• Macro: > 0.1mm in diameter e.g.muscular, elastic artery, muscular veins
• Micro: exchange b/w vessels & tissues e.g. arterioles, capillaries, post-capillary venules

Question 2

List BV & their general function

Answer 2

• arteries > withstand pressure
• arterioles > distibute
• capillaries > exchange
• Venules > drain
• Veins > reservoir

Question 3

What does tunica intima contain?

Answer 3

• Endothelium: simple squamous epith.
• fenestrations
• basal lamina
• Subendothelial layer: Loose CT, ~smooth muscle cells, internal elastic lamina (IEL)

Question 4

What does tunica media contain?

Answer 4

• circumferential smooth muscle cells
• Elastin, reticular fibres & proteoglycans in b/w cells
• external elastic lamina (EEL)

Question 5

What does tunica adventitia contain?

Answer 5

• longitudinal collagen fibres

- some elastic fibres

Question 6

What’s the vasa vasorum & vasa nervosum?

Answer 6

• Vasorum: smaller BV in TM & TA of LARGE vessels > provide nutrients
• Nervosum: BV (arteries) supply blood to nerves

Question 7

DIfferentiate elastic artery & muscular artery & arteriole from their obvious features

Answer 7

• Elastic: Thick TI, thin TA, lots of elastic fibres in tunics,
• Muscular: Thin TA, thick TA, prominent IEL & EEL, TM less elastic
• Arteriole: Thin TI, TM, TA, no IEL & EEL