NL coronary circulation

Question 1

main blood supply of the heart

* since myocardium is too thick to allow for O2 & nutrient diffusion from the intracardiac blood

Answer 1

coronary arteries

Question 2

RCA

Answer 2

supplies posterior wall & posterior part of inter ventricular septum

Question 3

Left main coronary artery splits into

Answer 3

1. left anterior descending artery (LAD)

2. Left circumflex artery (LCX)

Question 4

LAD

Answer 4

• supplies anterior wall

- anterior part of inter ventricular septum

Question 5

LCX

Answer 5

supplies lateral wall

Question 6

blood passes from the major coronary arteries through ____ of the myocardium

Answer 6

capillary beds

Question 7

venous blood is collected by

Answer 7

cardiac veins

Question 8

cardiac veins join together to form

Answer 8

coronary sinus - which empties blood into RA

Question 9

Adult cardiac muscle does not proliferate to replace damaged or destroyed muscle fibers, what happens instead?

Answer 9

they are repaired with non-contractile scar tissue.

- this decreases elasticity; affects conductivity = decreases blood flow