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BIO 242 Ch. 20: Cardiovascular System
The Cardiovascular system: The Heart
34
Anatomy
Undergraduate 2
01/31/2013

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Term
cardiovascular system
Definition
The _________ _______ consists of the blood, heart, and blood vessels.
Term
60,000
Definition
The heart is the pump that circulates the blood through an estimated ______ miles of blood vessels
Term
the mediastinum
Definition
The heart is found in the thoracic cavity in the midline partition called
Term
Pericardium
Definition
is a tough, fibrous, double-layered connective tissue sac which surrounds the heart.
Term
Fibrous pericardium
Definition
outer layer consisting of fibrous connective tissue
Term
Serous pericardium
Definition
inner layer consisting of a single layer of transparent epithelial cells
Term
Parietal pericardium
Definition
adheres to the fibrous pericardium
Term
Visceral pericardium (aka: Epicardium)
Definition
adheres to the heart surface
Term
Pericardial cavity
Definition
space between the parietal and visceral pericardia; contains serous pericardial fluid
Term
Myocardium
Definition
is composed of cardiac muscle and is immediately deep to the epicardium
Term
Endocardium
Definition
layer of epithelial cells which lines the heart cavities (atria and ventricles)
Term
Auricles
Definition
_____ are small pouches on the anterior surface of each atrium that slightly increase the
capacity of each atrium
Term
Sulci
Definition
_____ are grooves that separate the chambers and contain blood vessels and fat.
Term
Right atrium
Definition
Receives deoxygenated blood from the body, having three openings to allow this blood to enter:
(1) Superior vena cava
(2) Inferior vena cava
(3) Coronary sinus
Term
fossa ovalis
foramen ovale
Definition
In the septum separating the right and left atria is an oval depression, the _____ ______ , which
is the remnant of the __________ _____ .
Term
tricuspid valve.
Definition
Blood passes from the right atrium to the right ventricle through the
Term
Right ventricle
pulmonary trunk
pulmonary semilunar valve
Definition
a.The _____ventricle forms most of the anterior surface of the heart.
b.The ____ ventricle receives blood from the right atrium and then sends the blood to the lungs via the _____ _____ after it passes through the ______ ___ __________.
Term
Left atrium
pulmonary veins
bicuspid valve (aka: mitral valve)
Definition
a. The _____ ______ recevies oxygenated blood from the lungs via the ______ ____.
b. Blood passes from the left atrium to the left ventricle through the _____ _______.
Term
Left ventricle
aortic semilunar valve
aorta
Definition
a. The _____ ________ forms the apex of the heart.
b. Blood passes from the left ventricle through the _____ _______ ____ into the _____.
Term
ligamentum arteriosum
Definition
During fetal life the ductus arteriosus shunts blood from the pulmonary trunk into the aorta.
At birth, the ductus arteriosus closes and becomes the _________ _______.
Term
Atrioventricular valves
Definition
________ _________ are flaps of tissue which closes off the passageway between the atria and
the ventricles (they only permit blood to flow from the atria to the ventricles
Term
chordae tendinae
Definition
Back flow is prevented by the contraction of papillary muscles thus tightening the
_____ ______ which prevent the valve cusps from everting.
Term
The tricuspid valve
The bicuspid valve (aka: mitral valve)
Definition
Atrioventricular valves (aka: cuspate valves or cuspid valves) These include:
Term
Semilunar valves
Definition
These valve only permit outflow of blood from the heart
Term
The aortic semilunar valve
Definition
--found at junction between the left ventricle and the
origin of the aorta
Term
The pulmonary semilunar valve
Definition
--found at the junction between the right ventricle
and the origin of the pulmonary trunk.
Term
Interatrial septum
Definition
--wall which separates the two atria
Term
Foramen ovale
Definition
--opening in the fetal heart which allows blood to pass from the right atrium
to the left atrium in order to bypass the lungs
Term
Fossa ovalis
Definition
--depression in the interatrial septum which is the remnant of the foramen oval
Term
Interventricular septum
Definition
--wall which separates the two ventricles
Term
Atrioventricular canals
Definition
lead from the atria to their respective ventricles
Term
left side
Definition
The ___ ____ of the heart is the pump for the systemic circulation. It pumps oxygenated blood
from the lungs out into the vessels of the body.
Term
right side
Definition
The _____ ____ of the heart is the pump for the pulmonary circulation. It receives deoxygenated
blood from the body and sends it to the lungs for oxygenation.
Term
the coronary (cardiac) circulation
Definition
The flow of blood through the many vessels that pierce the myocardium of the heart is called ___ ______ ________ _________.

; it delivers oxygenated blood and nutrients to and removes
carbon dioxide and wastes from the myocardium.
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