Heart - Made Easy to remember and understand
Remember: Anxiety and stress make you forget. You have the knowledge, trust yourself and it will go well.
The heart pumps blood around the body including the lungs. It also
supplies the cells with oxygen for respiration.
The heart has 4 chambers: Pacemakers: Group of cells.
Right and left atrium Found in right atrium, control
Right and left ventricles the heartbeat.
Pulmonary- into the heart
Artery – Away/ out of the heart
Cardiac muscles are myogenic (naturally contracts and does not need to
receive impulses.
Circulatory system:
Humans have double circulatory system – 2 circuits joined together.
1st one – Right ventricle pump deoxygenated blood to the lungs to
take in oxygen. The blood then returns to the heart.
2nd one – Left ventricle pumps oxygenated blood around all other
organs in the body.
Superior vena cava – Carries deoxygenated blood from the upper
body
Inferior vena cava – Carries deoxygenated blood from the lower and
middle body
Pulmonary artery – Carries deoxygenated blood to lung
Pulmonary vein – Carries oxygenated blood from the lung
Valves – Helps blood flow in the right direction, prevent back flow
SAN (Sinoatrial node) – Heart pacemaker, responsible for regular
contraction
Septum – Divides left and right side of the heart
Left ventricle is the thickest as it pumps blood throughout the body
Remember: Anxiety and stress make you forget. You have the knowledge, trust yourself and it will go well.
The heart pumps blood around the body including the lungs. It also
supplies the cells with oxygen for respiration.
The heart has 4 chambers: Pacemakers: Group of cells.
Right and left atrium Found in right atrium, control
Right and left ventricles the heartbeat.
Pulmonary- into the heart
Artery – Away/ out of the heart
Cardiac muscles are myogenic (naturally contracts and does not need to
receive impulses.
Circulatory system:
Humans have double circulatory system – 2 circuits joined together.
1st one – Right ventricle pump deoxygenated blood to the lungs to
take in oxygen. The blood then returns to the heart.
2nd one – Left ventricle pumps oxygenated blood around all other
organs in the body.
Superior vena cava – Carries deoxygenated blood from the upper
body
Inferior vena cava – Carries deoxygenated blood from the lower and
middle body
Pulmonary artery – Carries deoxygenated blood to lung
Pulmonary vein – Carries oxygenated blood from the lung
Valves – Helps blood flow in the right direction, prevent back flow
SAN (Sinoatrial node) – Heart pacemaker, responsible for regular
contraction
Septum – Divides left and right side of the heart
Left ventricle is the thickest as it pumps blood throughout the body
