Shared Flashcard Set

Details

the heart
the heart
12
Anatomy
Undergraduate 1
12/03/2007

Additional Anatomy Flashcards

 


 

Cards

Term
mediastinum
Definition
the medial cavity of the thorax
Term
base
Definition
posterior surface of the heart, directed towards the right shoulder
Term
heart
Definition
-the transport system pump
-the size of a fist
-250 to 350 grams
-flanked by lungs laterally, sternum anteriorly, vertebral column posteriorally, rests on diaphragm
-between the 2nd rib to the 5th intercostal space
Term
point of maximal intensity
Definition
space between the 5th and 6th rib where you can feel the apex contracts
Term
pericardium
Definition
double-walled sac enclosing the heart
Term
fibrous pericardium
Definition
-loosely fitting part of the sac
-made of tough, dense connectiv tissue
-protects the heart
-anchors it to surrounding structures
-prevents overfilling of the heart w/ blood
Term
serous pericardium
Definition
-deep to the fibrous pericardium
-thin, slippery two layer serous membrane
Term
parietal layer
Definition
-lines the internal surface of the fibrous pericadium
-superior margin of the heart, attaches to large arteries exiting the heart& continues to external heart surface
Term
visceral layer/epicardium
Definition
external surface of the heart
Term
pericardial cavity
Definition
b/w the parietal and visceral layers, slitlike cavity which contains a film of serous fluid to lubricate heart during beating
Term

 

 

 

 

pathway of blood through the heart

Definition
 pulmonary circulation
-o2 poor, co2 rich blood returns from body
-enters right atrium to right ventricle
-rt. v pumps to lungs via pulmonary trunk
-blood unloads co2/picks up o2 in lungs
-o2 blood carried up by pulmonary veins
systemic circulation 
-back to left atrium, into left ventricle
-pumped into aorta
-transported via smaller systemic arteries to body tissues 
-gases & nutrients exhanged across capillary walls
-blood now co2 rich/o2 poor goes thru systemic veins
-enters right side of heart through venae cavae 
Term

 

 

 

coronary circulation 

Definition
-functional blood supply of the heart, shortest circulation in the body
-the arterial supply of the heart is provided by the right and left coronary arteries, arising from the aorta
-left coronary artery runs to the left side of the heart divides into: the anterior interventricular artery (supplies blood to the interventricular sulcus, septum and anterior walls of the ventricles; and the circumflex artery:  
Supporting users have an ad free experience!