4.1 Anatomy of the Heart and Vessels Part 4 Flashcards
What are the layers of the tunica media?
external elastic membrane
smooth muscle
internal elastic membrane
What does the tunica intima contain?
subendothelial tissue and layer of endothelium
What are capillary beds?
interconnected capillaries
What is the function of capillary beds?
exchange of materials with the cells of the body
What are small veins known as?
venules
Where is the blood collected from the capillary beds?
venuels
How many artery systems are there?
two; left and right
Where do the artery systems arise from?
base of the aorta
What are the functions of the artery systems?
supply oxygen and nutrients to the heart tissue
Where does the left coronary artery run?
towards the left side of the heart
What does the left coronary artery branch into?
anterior interventricular branch
circumflex branch
What is the function of the anterior interventricular branch?
supplies blood to both ventricles
What is the function of the circumflex branch?
supplies blood to the left atrium and left ventricle
Where does the right coronary artery run?
towards the right side of the heart
What does the right coronary artery branch into?
posterior interventricular artery
marginal artery
What does the right coronary artery supply?
right atrium and right ventricle
Where does the blood leave from the heart to the body?
aorta
Where does the aortic arch turn?
posteriorly
What does the aorta turn into?
descending aorta
What does the descending aorta turn into? When?
abdominal aorta; below the diaphragm
