Heart (Lab Based)

Question 1

Layers that form the fused pericardium

Answer 1

(inner) parietal serous pericardium
(middle) fibrous pericardium
(outer) pericardial mediastinal pleura

Question 2

Phrenicopericardial ligament (where)

Answer 2

Continuation of fibrous pericardium to the sternum and diaphragm

Question 3

Pericardial cavity (where)

Answer 3

Between parietal and visceral layers of heart.

Contains parietal fluid

Question 4

Auricular surface

Answer 4

Faces the left thoracic wall (can see the 2 auricles)

Question 5

Coronary groove

Answer 5

Runs around the heart and lies between the atria and ventricles and contains the coronary vessels and fat

Question 6

Paraconal interventricular groove

Answer 6

Auricular surface

Begins at pulmonary trunk (L auricle present) and adjacent to conus arteriosus.

Question 7

Subsinuosal interventricular groove

Answer 7

Atrial surface

Caudal aspect of atrial surface

Question 8

Which groove contains the terminal branch of the left coronary artery?

Answer 8

Subsinuosal interventricular groove

Question 9

Conus arteriosus (what)

Answer 9

Funnel shaped structure that gives rise to pulmonary trunk

Question 10

Ligamentum arteriosum

Answer 10

Fibrous connection between the pulmonary trunk and aorta (caudal to L subclavian artery)

Question 11

What was ligamentum arteriosum called in the fetus?

Answer 11

Patent ductus arteriosus

Question 12

Two parts of the R atrum

Answer 12

Sinus venarum

R auricle

Question 13

What is the source for most of the venous return?

Answer 13

Coronary sinus

Question 14

Fxn of intervenous tubercle

Answer 14

Btw 2 caval openings (R atrium)

Diverts the flow of blood from 2 caval veins to R AV valve.

Question 15

Fossa ovalis is what in fetus

Answer 15

Foramen ovale:allows blood to pass from R atrium to L atrium

Question 16

Pectinate muscles (where) and describe

Answer 16

Internal surface of wall of auricles

Interlacing muscular bands

Question 17

What is the internal surface of heart lined with? (membrane)

Answer 17

Endocardium

Question 18

Atrioventricular valves

Answer 18

Connect atriums to ventricles (L and R)

Contain 2 cusps: parietal (connects to (parietal) walls) and septal (connects to septum (septal margin))

Question 19

Chordae tendineae and papillary muscles

Answer 19

Chordae tendineae are attach to cusps of AV valves.

Papillary muscles anchor chordae tendineae.

Question 20

Muscles in atriums and ventricles

Answer 20

Atrium=pectinate

Ventricles=trabeculae carnae

Question 21

Where is the trabecula septomarginals? Fxn

Answer 21

Muscular strand that extends across the lumen of ventricle from septal to parietal wall. (will sometimes connect to papillary muscle).

Holds part of R bundle from AV bundle and helps with conduction

Question 22

Pulmonary valve and Aortic valve

• type of valve
• 2 components

Answer 22

Semilunar valve

• 3 cusps
• Nodule present on each cusp

Question 23

Origin of R coronary artery and pathway

Answer 23

R sinus of aorta

Encircles R side of heart in the coronary groove and can extend to the subsinuosal interventricular groove

Question 24

Origin of L coronary artery and pathway

Answer 24

L sinus of aorta

Terminates into 3 branches:
Circumflex branch
Paraconal interventricular branch
Subsinosal branch

Question 25

Great cardiac vein fxn

Answer 25

Returns blood supplied to the heart by the L coronary artery.

Great cardiac vein begins in paraconal interventricular groove.