Download Right Ventricle

Right Atrium
Left Atrium
Right Ventricle
Left Ventricle
Right Atrium
Receives blood from
the systemic circuit

Left Atrium
• Collects blood from the pulmonary
circuit
Right Ventricle
 Discharges
blood into the pulmonary circuit
Left ventricle
Ejects
it into the systemic circuit
Layers of <3 walls
The wall of the heart contains
three layers:
- Epicardium (visceral
pericardium)
- Myocardium
- Endocardium
Epicardium (visceral
pericardium)
Covers the outer
surface of the heart

It membrane
consists of an exposed
epithelium and an
underlying layer of
loose connective tissue
that is attached to the
myocardium.

Myocardium


Muscular of wall of the heart
contains cardiac muscle tissue,
blood vessels and nerves
The muscle tissue of the
myocardium forms concentric
layers that wrap around the atria
and spiral onto the walls of the
ventricles. It squeezing and
twisting contractions that
increase the pumping of the
heart.
Endocardium

The heart’s inner surface, including the heart
valves are covered endacarduim a simple
squamous epithelium that is continuous with
endothelium (epithelial lining) of the
attached blood vessels.
Arteries

Coronary arteries


purpose
Coronary vein



purpose
Blockage
Coronary sinus
Tissue and Cell of the heart


Cardiac Muscle Cell
 Contraction
 Intercalated discs specialized site where
membrane of adjacent cells are held together
by demuse and linked by gap junction (provide
movement of ions and small molecules,
enabling action potentials to travel rapidly from
cell to cell
Connective Tissue
 Collagen and fiber
 Purposes of fiber
Fibrous Skeleton of the Heart
 Blood
Vessel
 Connective Tissue
 Purpose: stabilizes the position and the
heart valves and physically isolates the
atrial muscle from ventricular muscle
tissue (important b/c it shows the timing of
ventricular contraction is relative to atrial
contraction can be controlled)”
Ventricles
 Purpose
 Difference
ventricles
between left and right
Valves of
the Heart
4 Valves
Right
Atrioventricular Valve
Pulmonary Semilunar Valve
Left Atrioventricular Valve
Aortic Semilunar Valve
Anatomy of a
Valve



2-3 cusps – flaps
Cusps are braced by chordae tendineae
 Connective tissue fibers meaning “tendinous
cords”
Fibers connected to papillary muscles
 Cone shaped projections on the inner
surface of the ventricle
 Contraction tenses the chordae tendineae
 Limit movement of cusps
 Prevent blood from moving backwards
Atrioventricular (AV) Valve



From atrium to ventricle
Right Atrioventricular Valve
 Tricuspid valve
 3 cusps
Left Atrioventricular Valve
 Bicuspid valve
 Mitral valve
 2 cusps
 Shaped like a bishop’s hat
Semilunar Valves
 Shaped
like a crescent moon
 Pulmonary (semilunar) valve
 Guards entrance to the
pulmonary trunk
 Start of pulmonary circuit
 Aortic (semilunar) valve
 Guards entrance to the aorta
 Start of the systemic circuit
Bibliography
 http://www.cfkeep.org/html/stitch.php?s
=72836608880047&id=50483372109461
 http://www.lookfordiagnosis.com/mesh_i
nfo.php?term=Papillary+Muscles&lang=1
 Medical science book
 http://withealth.net/tricuspid-valveanatomy
 http://www.teachervision.fen.com/circula
tory-system/printable/57731.html




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
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