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Cardiovascular System

Across
Their contraction pulls on and tightens the chordae tendineae, preventing valve cusps from everting
Collects deoxygenated blood from the systemic circulation
Cardiac muscle tissue
Left atrioventricular valve
Endothelial cells lining the interior of the heart; are continuous with the endothelium of blood vessels
Separate the upper and lower heart chambers, preventing backflow of blood from the ventricles back into the atria
Internal wall dividing the chambers of the heart
The gap junction and desmosome connections between individual cardiac muscle fibers
Prevent backflow of blood from the arteries into the ventricles
Pumps deoxygenated blood to the lungs for oxygenation
Down
Pumps oxygenated blood to all body cells, except the air sacs of the lungs
Blood vessels pierce the heart muscle and supply blood to the cardiac muscle fibers
Prevents back flow of blood from the right ventricle into the right atrium
Collects oxygenated blood from the pulmonary circulation
Inner visceral layer of the pericardium; adheres tightly to the surface of the heart