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Circulatory & Lymphatic
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Circulatory & Lymphatic
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Superior and inferior vena cava
Veins that carry deoxygenated blood to the right atrium of the heart
Right atrium
Receives deoxygenated blood from the vena cava
Tricuspid valve
Valve between the right atrium and right ventricle
Right ventricle
Pumps deoxygenated blood to the pulmonary artery
Pulmonary valve
Valve between the right ventricle and pulmonary artery
Pulmonary trunk
Carries deoxygenated blood from the right ventricle to the lungs
Pulmonary artery
Carries deoxygenated blood from the right ventricle to the lungs
Lungs (for gas exchange)
Organs where oxygen is taken in and carbon dioxide is released
Pulmonary vein
Carries oxygenated blood from the lungs to the left atrium
Left atrium
Receives oxygenated blood from the pulmonary veins
Bicuspid (mitral) valve
Valve between the left atrium and left ventricle
Left ventricle
Pumps oxygenated blood to the aorta
Aortic valve
Valve between the left ventricle and the aorta
The strongest contractions that help the blood move forward are from the ventricles
Diastole
The relaxation phase of the heart when the ventricles are filling with blood
Systole
The contraction phase of the heart when the ventricles pump blood
Parietal
The outermost covering of the heart, connected to the cavity
Visceral Pericardium
Cavity space between the parietal and the visceral layer of the heart
Serous layer
Contains serous fluid which reduces friction between the layers to allow contractions
Layers of the heart wall
Epicardium (outermost layer), Myocardium (thickest layer), Endocardium (lines the heart chambers)
Epicardium
Outermost layer of the heart
Myocardium
Thickest layer of the heart that does most of the contracting
Endocardium
Inner lining of the heart chambers
Special coating (prostacyclin)
Prevents clotting in the heart
Structures of the heart
Base (superior part of the heart), Apex (inferior part of the heart)
Pulmonary circuit
Part of the circulatory system where gas exchange occurs in the lungs
Systemic circuit
Part of the circulatory system where capillaries exchange gases and collect waste from tissues throughout the body
Tunica externa
Thin, permeable outer layer of blood vessel walls
Tunica media
Thickest layer of blood vessel walls
Tunica interna
Squamous epithelial layer that is permeable and secretes something to prevent clotting
