Anatomy Lecture 2 -- Heart Internal Anatomy Flashcards Preview

Block C - Circulation > Anatomy Lecture 2 -- Heart Internal Anatomy > Flashcards

Flashcards in Anatomy Lecture 2 -- Heart Internal Anatomy Deck (38):
1

3 layers of heart

Epicardium Myocardium Endocardium

2

Definition of a valve

Fibrocartilage covered with endothelium/endocardium (depending on position)

3

Function of valve

Ensure unidirectional bloodflow

4

Locations of valves

Everywhere in body that requires unidirectional blood flow

5

Which side is the mitral valve located?

Left (between left ventricle and atrium)

6

Which side is tricuspid valve located?

Right (between right ventricle and atrium)

7

What comprises the skeleton of the valve structure?

Fibrocartilage

8

3 types of fibrous rings

Atrio-ventricular (mitral, tricuspid) Aortic Pulmonary

9

2 types of fibrous trigones

Right (between aortic and mitral valves) Left (surrounded by aortic, tricuspid and mitral valves)

10

Purpose of fibrous skeleton

Strength to structure (stabilization) Rigidity Attachment of ventricular muscle fibres

11

Define the fossa ovalis

Membranous embryonic leftover where the blood used to shunt directly to left atrium from right atrium

12

Define the crista terminalis

Fusion point between the right SV and atrium

13

Define musculi pectinati

Fibres arranged like a rooster's comb in the walls of the right atrium that are not strong enough to pump

14

3 inflow holes in right atrium

SVC IVC coronary sinus

15

1 outflow hole in right atrium

Tricuspid valve to right ventricle

16

Define the trabeculae carnae

Folds of muscle in the ventricle

17

Form of the aortic valve "flaps"

Bags (3 sinuses)

18

Function of aortic valve noduels

Allow edges of sinuses to touch (complete closure)

19

Define the papillary muscle

Modifications of the trabeculae carnae that contract to pull valve cusps downwards during ventricicular relaxation

20

Number of popillary muscles in left and right

2 in left ventricle 3 in right ventricle

21

Purpose of chordae tendinae

Tendinous cords that attach the aortic sinuses to the papillary muscles

22

What generates the rhythm of the heart?

Sinoatrial node (pacemaker)

23

Location of sinoatrial node

Wall of right atrium between SVC and IVC

24

To what structure does the signal from the sinoatrial node travel?

Interatrial node

25

Where does the signal travel from the interatrial node?

Purkinje fibers located in the myocardium

26

Number the structures according to the direction of flow (1 - 10)

27

Which valve is more anterior: pulmonary or aortic?

Pulmonary

28

Define the structures highlighted in blue (right atrium)

Superior vena cava

Inferior vena cava

Coronary sinus

29

Define the red lines in the right atrial wall

Musculi pectinati

30

Define the structure in green

Crista terminalis

31

Define the structure outlined in red and indicated by an arrow (right atrium)

Exit to right ventricle

32

Define the oval structure between the green line and blue teardrop

Fossa ovalis

33

Define the large green area

Anterior cusp of the mitral valve

34

Define the green lines

Chordae tendinae

35

Define the red lines

Papillary muscles

36

Define the red dots

Orifices of the coronary arteries

37

Define the dark black dots (above the green area)

Aortic valve nodules

38

Define the structure circled in red

Pulmonary trunk