Anatomy Unit 5: Heart

Front 1

Coronary Sulcus

Back 1

Also known as atrioventricular. Separates atria from ventricles.

Front 2

Sulcus Terminalis

Back 2

Sulcus connecting right margin of superior and inferior Vena Cava.

Front 3

Pericardial sac

Back 3

Double walled sac that surrounds heart and roots of vesicles. Has both a fibrous and 2 serous layers.

Front 4

Layers of pericardium

Back 4

Fibrous pericardium - stout external layer.
Serous pericardium - has parietal layer fused to fibrous pericardium and visceral layer which covers the heart itself (also called epicardium).

Front 5

Transverse Pericardial Sinus

Back 5

Space posterior to ascending aorta and pulmonary trunk and anterior to superior vena cava.

Front 6

Oblique Pericardial Sinus

Back 6

Blind recess on posterior aspect of heart caused by pullmonary veins and inferior vena cava.

Front 7

Projection of heart apex onto thoracic wall

Back 7

8 cm from median plane in left 5th intercostal space

Front 8

Contents and connections to base of heart

Back 8

Mainly formed by left atrium, a small part of right atrium. Pulmonary veins and superior and inferior vena cava connect with base.

Front 9

Inferior border location on chest wall

Back 9

Line sloping caudally and to the left through xiphosternal junction

Front 10

Right border location on chest wall

Back 10

3cm to right of sternal margin

Front 11

Left border location on chest wall

Back 11

Angles superiorly from apex to second intercostal space, 3 cm from sternal margin.

Front 12

Beginning of ascending aorta location on chest wall

Back 12

3rd intercostal space.

Front 13

Pulmonary valve chest wall location and listen location

Back 13

Located left of sternum at level of 3rd costal cartilage.
Listen in second intercostal space on left.

Front 14

Aortic valve chest wall location and listen location

Back 14

Located near left side of sternum at level of 3rd intercostal space.
Listen in second intercostal space on right.

Front 15

Mitral valve chest wall location and listen location

Back 15

Located near left of sternum at level of 4th costal cartilage.
Listen in 5th costal cartilage 3 and 1/2 inches to left of midline

Front 16

Sinus Venarum

Back 16

Smooth part between 2 Vena Cava in right atrium. Located on posterior wall of right atrium.

Front 17

Crista Terminalis

Back 17

Internal to sulcus terninalis, separates the right atrium from the vena cava internally.

Front 18

Pectinate Muscles

Back 18

Bundles of rough muscle fibers. Found in the auricula of the atria.

Front 19

Fossa Ovalis

Back 19

Embryonic remenant of foramen ovale. Is a smooth oval found on wall of right atrium. Limbus of fossa ovalis is prominant ridge of oval.

Front 20

Tricuspid valve

Back 20

Valve between the right atrium and ventricle. Muscles located in ventricle. Have septal, posterior, and anterior muscles.

Front 21

Trabeculae Carnae

Back 21

Thick muscle bundles in ventricles which give the ventricle the rugged appearance.

Front 22

Septomarginal Trabeculae (Moderator Band)

Back 22

Extends from interventricular septum to the root of the anterior papillary muscle of the right ventricle.

Front 23

Papillary Muscles

Back 23

Conical projections of ventricular muscle related to the AV valve cusps.

Front 24

Chorda Tendineae

Back 24

Fibrous chords attaching papilary muscles to the valve cusps of the AV valves.

Front 25

Infundibulum

Back 25

(aka conus arteriosus or outflow tract) Smooth part of right ventricle just inferior to the pulmonary valve.

Front 26

Supraventricular Crest

Back 26

Ridge on the inner wall of the right ventricle separating the infundibulum and the trabecular portion of ventricle. (seperates inflow and outflow tracts).

Front 27

Auricle

Back 27

Atrial appendage

Front 28

Valve of foramen ovale

Back 28

On the left atrium opposite the fossa ovalis.

Front 29

Mitral Valve

Back 29

Valve between the left atrium and ventricle. Has both anterior and posterior muscles.

Front 30

Aortic Vestibule

Back 30

(aka outflow tract) Smooth portion of the left ventricle just inferior to the aortic valve. Separated from the inflow tract by the anterior mitral cusp.

Front 31

Membranous part of the interventricular septum

Back 31

Below the right and posterior cusps of the aortic valve.

Front 32

Semilunar valves

Back 32

Valves of the ventricles to their arteries. Have 3 cusps with nodules. Have pulmonary valve and aortic valve.

Front 33

SA Node

Back 33

Pacemaker. At upper end of the sulcus terminalis at junction of superior vena cava and right atrium.

Front 34

AV node

Back 34

At right side of the interatrial septum above and in front of the opening of the coronary sinus.

Front 35

Atrioventricular bundle (Bundle of His)

Back 35

Runs below the membranous part of interventricular septum. Divides into left and right bundle branches.
Right - Chord-like and runs on moderator band. Connects with purkinje fiber network of right ventricle.
Left - Wider than righ, divides into anterior and posterior fasciculi on the left surface of the interventricular septum. Connects with the purkinje network.

Front 36

Supraventricular Crest

Back 36

Along with the septomarginal trabeculae, seperates the trabecular portion of right ventricle (inflow tract) from the smooth portion (infunbibulum, outflow tract).

Front 37

Pulmonary Orifice

Back 37

Gaurded by Pulmonary valve