means pertaining to the heart and blood vessels.
is a hollow, muscular organ located in the thoracic cavity, between the lungs.
is the double-walled membranous sac that encloses the heart.
is the external layer of the heart and the inner layer of the pericardium.
is the middle and thickest of the heart's three layers.
which consists of epithelial tissue, is the inner lining of the heart.
which supply oxygen-rich blood to the myocardium.
are the two upper chambers of the heart, and these chambers are divided by the interatrial septum.
are two lower chambers of the heart, and these chambers are divided by the inter ventricular septum.
controls the opening between the right atrium and the right ventricle.
is located between the right ventricle and the pulmonary artery.
is located between the left atrium and left ventricle.
is located between the left ventricle and the aorta.
is the flow of blood only between the hearts and lungs.
carry deoxygenated blood out of the right ventricle and into the lungs.
carry the oxygenated blood from the lungs into the left atrium of the heart.
includes the flow of blood to all parts of the body except the lungs.
is the ability to pump blood effectively throughout the body; the contraction and relaxation (beating) of the heart must occur in exactly the correct sequence.
is located in the posterior wall of the right atrium near the entrance of the superior vena cava.
is located on the floor of the right atrium near the interatrial septum.
is a group of fibers located within the inter ventricular septum.
are specialized conductive fibers located within the walls of the ventricles.
are large blood vessels that carry blood away from the heart to all regions of the body.
is the largest blood vessels in the body.
are the major arteries that carry blood upward to the head.
are the smaller, thinner branches of the arteries that deliver blood to the capillaries.
which are only one epithelial cell in thickness, are the smallest blood vessels in the body.
form a low-pressure collecting system to return oxygen-poor blood to the heart.
are the smallest veins that join to form the larger veins.
are the two largest veins in the body.

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The Heart


Heart structure


Circulatory System

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