Heart is a muscle.

Heart moves 2,000 gallons of blood per

day.

Heart beats 60 to 100 times per minute.

The heart weighs about 9 to 12 ounces.

A hollow muscular organ .

Heart forces the blood by way of arteries

to lungs and to various tissues of the body.

Covered by double membrane of

Pericardium.

Conical and pointed shape.

Size is about your tightened fist.

Heart is located in chest and is well

protected by rib cage.

Endocardium

Deepest layer of the Heart.

Myocardium

Middle layer of the Heart.

Pericardium

Outermost protective layer of the Heart.

The human heart have 4 chambers.

R. atrium

L. atrium

R. ventricle

L. ventricle

The right atrium carries deoxygenated

blood from body.

Having a valve which is named as

Tricuspid valve.

Receives deoxygenated blood from the

right atrium through the tricuspid valve.

Receives oxygenated blood from the

pulmonary veins.

The bicuspid valve guard the passage of

blood from the Left Atrium to the Left

Ventricle.

Left ventricle is Larger than Right

Ventricle.

Receives oxygenated blood from the

Left Atrium and pumps it into Aorta.

Tricuspid valve

Pulmonary valve

Bicuspid valve

Aorta valve

Veins and Arteries are the Blood Vessels.

Veins carry de-oxygenated blood to the

Heart.

Arteries carry oxygenated blood away

from the Heart.

The Pulmonary vein is the only vein which

carries oxygenated blood.

The heart circulates blood through two

pathways: the pulmonary circuit and the

systemic circuit.

In the pulmonary circuit, deoxygenated

blood leaves the right ventricle of the

heart via the pulmonary artery and

travels to the lungs, then returns as

oxygenated blood to the left atrium of

the heart via the pulmonary vein.

In the systemic circuit, oxygenated blood

leaves the body via the left ventricle to

the aorta, and from there enters the

arteries and capillaries where it supplies

the body's tissues with oxygen.

Deoxygenated blood returns via veins to

the vena cava, re-entering the heart's

right atrium.