Heart (Lab Based) Flashcards
Layers that form the fused pericardium
(inner) parietal serous pericardium
(middle) fibrous pericardium
(outer) pericardial mediastinal pleura
Phrenicopericardial ligament (where)
Continuation of fibrous pericardium to the sternum and diaphragm
Pericardial cavity (where)
Between parietal and visceral layers of heart.
Contains parietal fluid
Auricular surface
Faces the left thoracic wall (can see the 2 auricles)
Coronary groove
Runs around the heart and lies between the atria and ventricles and contains the coronary vessels and fat
Paraconal interventricular groove
Auricular surface
Begins at pulmonary trunk (L auricle present) and adjacent to conus arteriosus.
Subsinuosal interventricular groove
Atrial surface
Caudal aspect of atrial surface
Which groove contains the terminal branch of the left coronary artery?
Subsinuosal interventricular groove
Conus arteriosus (what)
Funnel shaped structure that gives rise to pulmonary trunk
Ligamentum arteriosum
Fibrous connection between the pulmonary trunk and aorta (caudal to L subclavian artery)
What was ligamentum arteriosum called in the fetus?
Patent ductus arteriosus
Two parts of the R atrum
Sinus venarum
R auricle
What is the source for most of the venous return?
Coronary sinus
Fxn of intervenous tubercle
Btw 2 caval openings (R atrium)
Diverts the flow of blood from 2 caval veins to R AV valve.
Fossa ovalis is what in fetus
Foramen ovale:allows blood to pass from R atrium to L atrium
Pectinate muscles (where) and describe
Internal surface of wall of auricles
Interlacing muscular bands
What is the internal surface of heart lined with? (membrane)
Endocardium
Atrioventricular valves
Connect atriums to ventricles (L and R)
Contain 2 cusps: parietal (connects to (parietal) walls) and septal (connects to septum (septal margin))
Chordae tendineae and papillary muscles
Chordae tendineae are attach to cusps of AV valves.
Papillary muscles anchor chordae tendineae.
Muscles in atriums and ventricles
Atrium=pectinate
Ventricles=trabeculae carnae
Where is the trabecula septomarginals? Fxn
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
Pulmonary valve and Aortic valve
- type of valve
- 2 components
Semilunar valve
- 3 cusps
- Nodule present on each cusp
Origin of R coronary artery and pathway
R sinus of aorta
Encircles R side of heart in the coronary groove and can extend to the subsinuosal interventricular groove
Origin of L coronary artery and pathway
L sinus of aorta
Terminates into 3 branches:
Circumflex branch
Paraconal interventricular branch
Subsinosal branch
Great cardiac vein fxn
Returns blood supplied to the heart by the L coronary artery.
Great cardiac vein begins in paraconal interventricular groove.
