Describe the location, characterize the structure, and delineate the boundaries of the heart, the major vessels, and the pericardium.

Question 1

location of heart

Answer 1

in the mediastinum (bw lungs)

Question 2

right atrium receives blood (what kind) from where

Answer 2

venous blood from: SVC, IVC, coronary sinus

Question 3

right auricle function

Answer 3

expands with sudden abrupt increase in volume

Question 4

sinus venarum structure

Answer 4

smooth space on posterior wall between openings of the SVC & IVC

Question 5

Sulcus terminalis

Answer 5

vertical groove separating the rough (anterior) & smooth (sinus venarum) parts of the arterial wall, externally

Question 6

crista terminalis

Answer 6

same as sulcus but INTERNALLY

Question 7

characteristics of ANT. wall

Answer 7

larger, thicker, and has pectinate muscles in parallel bundles

Question 8

AV node location

Answer 8

on ventricular side of interatrial septum near the coronary sinus

Question 9

SA node

Answer 9

pacemaker on superior end of the sulcus terminalis near the opening of the SVC., deep to the epicardium

Question 10

Coronary sinus location and role

Answer 10

opening between right AV & IVC orifices that receive blood from the coronary veins

Question 11

left atrium forms apex of heart T or f

Answer 11

f: forms base of the heart

Question 12

LA slightly thicker than RA

Answer 12

T

Question 13

semilunar depression

Answer 13

on the interatrial septum on other side of oval fossa

Question 14

where is AV orifice

Answer 14

top of mitral valve

Question 15

LA contains entrance of right and left pair of which valveless veins

Answer 15

pulmonary veins

Question 16

bundle of His is incorporated where

Answer 16

interventricular septum

Question 17

conus arteriosus

Answer 17

funnel leading to pulmonary trunk from right ventricle

Question 18

treabeculae carnea is what kind of muscular arrangement and allows for which kind of directional contractions

Answer 18

irregular muscular arrangement allowing for a contraction from all directions

Question 19

known as a fibrous ring supporting a very large opening

Answer 19

R atrioventricular orifice

Question 20

chordae tendineae

Answer 20

string like structures attaching AV valve to papillary muscles on ventricles walls

Question 21

papillary muscles

Answer 21

each leaflet of the valve controlled b its own muscle, contract ventricular systole holding the valve in closed position (pressure closes it)

Question 22

Septomarginal Trabeculum

Answer 22

connects interventricular septum and anterior wall of the right ventricle. Convey the right brand of the atrioventricular bundle

Question 23

LA thicker wall T or F

Answer 23

T

Question 24

Trabeculae Carnea on the L is smaller/bigger, and more/less than the RV

Answer 24

smaller and MORE numerous than the R

Question 25

pericardium: double or single walled fibroserous sac

Answer 25

double

Question 26

pericardium layers outer to inner

Answer 26

fibrous - tough outer layer with connective tissue that anchors heart, prevent overfilling
serous - simple squamous epithelium layer
parietal - lines fibrous pericardium
visceral - covers outer surface of heart

Question 27

coronary sulcus is located where and separates which structure

Answer 27

runs along the heart’s widest circumference and separates atria from ventricle