heart pt.2.2

Question 1

Each side of heart has two chambers: an ____ (receives blood) which sends blood to a ____ (pumps blood out of heart)

Answer 1

atrium, ventricle

Question 2

separates right and left atria

Answer 2

interatrial septum

Question 3

separates right and left ventricles. much thicker than interatrial septum

Answer 3

interventricular septum

Question 4

valves between each atrium and ventricle. Allow only one-way blood flow from atrium into ventricle

Answer 4

atrioventricular (AV) valves

Question 5

at exit from each ventricle; allow only one-way blood flow from ventricle out into aorta or pulmonary trunk

Answer 5

semilunar valves

Question 6

muscular ridges located inside both atria along the anterior atrial wall and in the auricles

Answer 6

pectinate muscles

Question 7

remnant of fetal foramen ovale that allowed fetal blood to pass between atria; closes at birth

Answer 7

fossa ovalis

Question 8

muscular ridges inside both ventricles

Answer 8

trabeculae carneae

Question 9

tendon-like connective tissue bands attaching to cusps of AV valves

Answer 9

chordae tendineae

Question 10

cone-shaped _____ _____ anchor chordae tendineae to prevent cusps from flapping all over the place

Answer 10

papillary muscles

Question 11

tenses papillary muscles just before ventricular contraction; thickened muscle ridge providing rapid conduction path; prevents slamming or inversion of A V valve

Answer 11

moderator band