By: Samantha Peterson
Laura Soehngen
BJ Dean
Zach Palesch
Four Chambers
 Left and Right Atrium- upper and receiving
chambers
 Left and Right Ventricles- lower and
pumping chambers
 Atrium means “entrance hall” in Latin
 Ventricle means “little belly” in Latin
http://inspirations786.wordpress.com/2011/11/15/four-chambers-of-heart-islamic-polygamy-of-up-to-four-wives-andmiracle-of-allah/
Layers of Heart Wall
 Endocardium- smooth thin layer of cells that helps to
reduce friction caused by blood that is constantly
moving through chambers
 Pericardium- A sac that fits loosely over the heart
 Myocardium- muscular wall constantly active and
needs a generous supply of oxygen and energy from
blood
http://paramedicine101.blogspot.com/2009/08/basic-cardiology-part-i.html
Inner Anatomy
http://science.howstuffworks.com/environmental/life/human-biology/heart2.htm
Outer Anatomy
SUPERIOR
VENA CAVA
AORTA
PULMONARY TRUNK
RIGHT
ATRIUM
PULMONARY VEINS
LEFT ATRIUM
RIGHT
VENTRICLE
LEFT VENTRICLE
http://quizlet.com/2507160/external-heart-anatomy-pics-flash-cards/
Valves of the Heart
 There are 4 valves of the heart
 Tricuspid valve: right side, 3 cusps
 Mitral valve: 2 cusps
 Pulmonary valve: between Right ventricle and
pulmonary artery, opens as Right ventricle contracts and
forces blood out to the lungs
 Aortic valve: between the Left ventricle and the aorta ,
opens as Left ventricle contracts and forces blood out to
the body
 Heart valves open
 Cusps forced apart by pressure of blood pumped by
ventricle
 Heart valve closed
 Pressure causes the cusps to close and seal preventing
reverse blood flow
Bibliography
 The Circulatory System by Regina Avraham
 The Human Body by Steve Parker