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1.1 The Heart

Science 30 Bio Unit The Heart 1.1

Circulatroy System/Cardiovascular System: -system consisting of heart, blood vessels, & blood circulating through body.
4 key elements of circulatory system: -transports and delivers oxygen and nutrients. -transports and delievers chemical messengers throughout body (ex.hormones) -distributes body heat -defends against disease
cardiovascular= cardio+vascular: cardio=heart vascular=blood vessels and blood
oxygenated or deoxygenated? Superior Vena Cava Deoxygenated
oxygenated or deoxygenated? Pulmonary Artery Deoxygenated
oxygenated or deoxygenated? Pulmonary Veins Oxygenated
oxygenated or deoxygenated?Inferior Vena Cava Deoxygenated
oxygenated or deoxygenated? Right Atrium Deoxygenated
oxygenated or deoxygenated? Right Ventricle Deoxygenated
oxygenated or deoxygenated? left ventricle oxygenated
oxygenated or deoxygenated? left atrium oxygenated
oxygenated or deoxygenated? aorta oxygenated
septum: a thick wall of muscle that divides the left and right sides of the heart
atrium: the smaller upper chamber that recieves blood returning to the heart.
ventricle: the larger v-shaped bottom chamber that pumps blood from the heart.
heart valves: thin flaps of tissue in the heart that open and close to ensure the proper direction for blood flow.
diastole: the phase of the heart's cycle where a chamber of the heart(atrium or ventricle), relaxes and fills with blood.
systole: the phase of the heart's cycle when the ventricles contract to eject blood from within the chamber>
"Lubb" "Dubb" (1)Lubb: AV Valves close (2)Dubb: AV Valves open
Created by: Skyerene