cardiovascular

Question 1

what is the mediastinum

Answer 1

cavity that contains heart

Question 2

boundaries of mediastinum

Answer 2

sternum to vertebral column
1st rib to diaphragm
between pleura of lungs

Question 3

what is the division between the superior and inferior mediastinum

Answer 3

sternal angle

Question 4

what is the fibrous pericardium

Answer 4

outer layer that protects heart and prevents overstretching
-anchors heart to mediastinum

Question 5

where is the heart located in the thoracic cavity

Answer 5

2/3 heart is left of midline
5th intercostal space
apex on diaphragm

Question 6

what are the different surfaces of the heart

Answer 6

base
anterior
diaphragmatic
right pulmonary
left pulmonary

Question 7

where do all arteries supplying the heart start from

Answer 7

left and right coronary arteries start at base of aorta and branch

Question 8

where do all the veins draining the heart drain into

Answer 8

coronary sinus then into right atrium

Question 9

how do cusped valves work

Answer 9

-gravity opens valves for blood to flow from atria to ventricle
-ventricle contracts to push blood out
-as ventricle contracts papillary muscles contract to pull cordae tendinae to prevent valve collapse