TOPIC 2B. The left half of the heart

Question 1

which side of the heart is thicker

Answer 1

the left

Question 2

how many openings in left atrium

Answer 2

5-6 where pulm veins enter with oxygenated blood

Question 3

what is attached to the left atrium

Answer 3

the left auricle

Question 4

what is the attachment of the left auricle to the left atrium strengthened by

Answer 4

mm pectinati

Question 5

what is fossa ovalis

Answer 5

remnant of foetal foramen ovale - which connected left and right atria

Question 6

ostium venarum pulmonaliis

Answer 6

5-6 openings

Question 7

what are the trabeculae carneae

Answer 7

muscular irregularities of interior of ventricle walls - reduce blood flow turbulence

Question 8

what does LV receive/do

Answer 8

receives oxygenated blood from L.A and pumps it out to the body via aorta

Question 9

what are trabeculae septomarginalis

Answer 9

muscular strand extending from septum to parietal wall to 2 papillary muscles

Question 10

function of trabeculae septomarginalis

Answer 10

shortcut for electrical conduction

Question 11

name the papillary muscles in the left ventricle

Answer 11

m papillaris subauricularis

m auricularis subatrialis

Question 12

what valves are between left atrium and ventricle

Answer 12

bicuspid valves - ostium atrioventricular sinister

Question 13

name the 2 valves separating left atrium and ventricle

Answer 13

cuspis paritalis

cuspis septalis

Question 14

what valves are present in the aorta

Answer 14

semilunar valves (3)

Question 15

name the valves of aorta

Answer 15

semilunaris dextra - small hole
semilunaris sinistra - big hole
semilunaris septalis - no hole

Question 16

what are on the semilunar valves to ensure a tight seal

Answer 16

nodules of arantini

Question 17

name the fibrous connection between pulmonary trunk and aorta

Answer 17

lig arteriosum

Question 18

what is lig arteriosum called in fetus

Answer 18

ductus arteriosum/botalli