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Three Major Elements – Heart, Blood Vessels, & Blood

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Rohit Dutta

on 22 May 2015

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Transcript of Three Major Elements – Heart, Blood Vessels, & Blood

The Heart
Cardiac muscle tissue
Highly interconnected cells
Four chambers
Blood Types
Blood Circulatory System
Four Chambers
Right atrium
Right ventricle
Left atrium
Left ventricle

Superior Vena Cava
Right Atrium
Right Ventricle
Pulmonary Semilunar Valve
Pulmonary Vein
Left Ventricle
Aortic Semilunar Valve
To the bodies organs & cells

Pathway of the blood
The pathway between the left and right sides of the heart.
Pulmonary circuit
Systemic circuit
The blood pathway between the right side of the heart, to the lungs, and back to the left side of the heart.
Functions of the Heart
Regulating blood supply
Heart separates pulmonary and systemic circulations
Heart valves ensure one-way flow
Changes in contraction rate and force match blood delivery to changing metabolic needs
Generating blood pressure
Routing blood
Ensuring one-way blood flow
Blood Flow Through Heart
Systemic and Pulmonary Circulation
Refractory Period
Long refractory period prevents tetanic contractions
Absolute: Cardiac muscle cell completely insensitive to further stimulation
Relative: Cell exhibits reduced sensitivity to additional stimulation
Cardiac Cycle
Blood moves through circulatory system from areas of higher to lower pressure.
Heart is two pumps that work together, right and left half
Repetitive contraction (systole) and relaxation (diastole) of heart chambers
Contraction of heart produces the pressure
Cardiac Cycle
Blood Vessels
Saksham Gairola
Roll No:02
Human Heart
Thank You !!
Full transcript