Lecture 2 - CVS Imaging and Anatomy Flashcards
this lecture is imaging based so look over the slides, at the images
cool
what are the three layers of the arteries/ arterioles ?
Tunica Interna - thin layer of endothelial cells with an internal elastica lamina
Tunica Media - smooth muscle
Tunica Externa - thick elastic tissue to resist high pressures
what are the roles of the three artery sizes ?
Large - elastic for high pressure - aorta and its branches
Medium - distributing arteries - carry blood, ie to muscles
Small - arterioles - have smooth muscle for contraction on surface - they are the resistance vessels - control BP ect - more in lecture 5
what are the branches of the aorta ?
right and left Carotid arteries - supply the head, neck, brain and face
right and left subclavican arteries - supply the right and left thorax and arms respectively
brachiocephalic artery splits into right carotid and subcalvican arteries
descending aorta will supply the lower parts of the body - abdomen and limbs
what is the cardiac output of a 70kg man under rest
5L/min
upto 25 - 35L/min during exercise
CO = Heart rate * Stroke Volume
what organ takes a disproportional amount of blood from the heart ?
the kidneys - at about 22 %
what is the structure of the heart wall ?
three layers of tissue
Epicardium - serous membrane - smooth outer surface of heart - simple squamous epithelium and loose connective tissue and adipose tissue
Myocardium - middle thick layer, made of cardiac myocytes - responsible for heart contractions
Endocardium - smooth inner surface of heart chamber
followed by
Pectinate Muscles - muscular ridges in the auricles and right atrial wall
Trabeculae Carnae - muscular ridges and columns on the inside walls of the vetricles
role of the pericardium ?
allows heart to move and stretch within the cavity
