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30 Cards in this Set

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Mediastinum
space btwn. lungs
a mass tissue that extends from the sternum to the lungs
Apex
the pointed edge of the heart which is directed anteriorly, inferiorly and to the left.
Base
Posteriorly, inferiorly and to the right
broad portion of the heart opposite of apex
The Pericardium
around the heart
Fibrous pericardium (outer layer)
Serous pericardium (inner layer)
Parietal (outer) layer of serous pericardium
Pericardial cavity
Visceral (inner) layer of serous pericardium
Fibrous pericardium (outer layer)
tough, inelastic, dense irr. conn. tissue
resembles a bad that rests on and attaches to the diaphram
prevents overstretching of the heart
Serous pericardium (inner layer)
thinner, more delicate membrane that forms a double layer around the heart
Parietal (outer) layer of serous pericardium
fused to the fibrous pericardium
Pericardial cavity
contains pericardial fluid
btwn. visceral layer and parietal layer
Visceral (inner) layer of serous pericardium
AKA Epicardium
adheres tightly to the surface of heart
Heart Wall
Epicardium
Myocardium
Endocardium
Epicardium (visceral layer of serous pericardium)
thin, transparent outer layer of the wall composed of mesothelium and delicate conn. tissue that imparts a smooth slippery texture to the heart
Myocardium
cardiac muscle tissue
bulk of heart, responsible for pumping action
straited like skeletal
involuntary like smooth cardiac muscle fibers swirl diagonally around the heart in interlacing bundles
Endocardium
Also an example of "endothelium"
inner layer of heart wall
thin layer of endothelium overlying a thin layer of conn. tissue
provides smooth lining for the chambers of heart and cover valves of heart
continuous with endothelium lining of the large blood vessel attached to the heart.
Heart Chambers
R. Atrium
L. Atrium
R. Ventricle
L. Ventricle
Right Atrium
known as "receiving" chambers
Ant. wall has pectinate muscles; posterior wall is smooth
Receives deoxygenated blood from 3 vessels - sup. and inf. vena cava; coronary sinus
Fovea ovalis
R. auricle
Fossa Ovalis
an oval depression, which is remnant of the foramen ovale, an opening in the interatrial septum of the fetal heart that directs blood from the right to left atrium in order to bypass the nonfunctioning fetal lungs.
L. atrium
"receiving" chambers
forms most of the base of heart
receives blood from lungs through four pulmonary veins
smooth post. wall
Receives oxygenated blood from pulmonary
L. auricle
L. auricle
on top of atrium
ear
R. Ventricle
known as "pumping chambers"
Trabeculae carnae
Papillary muscles
Chordae tendinae
Receives blood from the right atrium and pumps it to the pulmonary artery.
Trabeculae carnae
muscular folds or ridges
Papillary muscles
extends from trabeculae
Chordae tendinae
attach to bottom valves of heart
L. Ventricle
"Pumping" chamber
Wall of ventricle thicker than right
Trabeculae Carnae
Receives blood from the left atrium and pumps it to the aorta.

Papillary muscles
Chordae tendinae
Interatrial septum
Btwn. the left and right atrium is a thin partition called the _____.
Interventricular septum
The r. ventricle is separated from the L. ventricle by a partition called ______.
Atrioventricular septum
The small part of the membranous septum of the heart just above the septal cusp of the tricuspid valve, separating the right atrium from the left ventricle.
Cardiac Skeleton
Dense conn. tissue wich forms foundation of heart to which valves attach serves as a point of insertion for cardiac muscle bundles
Coronary sulcus
contains coronary sinus
Anterior interventricular sulcus
frontal groove btwn. the ventricles
Posterior interventricular sulcus
post. surface of heart which marks the boundary btwn. the ventricles on post. aspect of the heart.