❤️ Human Heart – Simple Explanation





 🫀 What is the Heart?

The human heart is a muscular organ about the size of your fist. It works like a pump that circulates blood throughout the body, supplying oxygen and nutrients and removing waste products.

🧠 Location

Located in the chest (thoracic cavity)

Slightly tilted toward the left side

Protected by the rib cage

🏗️ Structure of the Heart

The heart has 4 chambers:

Right Atrium (RA)

Receives deoxygenated blood from the body

Right Ventricle (RV)

Pumps blood to the lungs

Left Atrium (LA)

Receives oxygenated blood from lungs

Left Ventricle (LV)

Pumps oxygen-rich blood to the entire body

🚪 Heart Valves (Control Blood Flow)

Tricuspid Valve – between RA and RV

Pulmonary Valve – between RV and lungs

Mitral (Bicuspid) Valve – between LA and LV

Aortic Valve – between LV and aorta

👉 These valves prevent backflow of blood.

🔄 Blood Flow Through the Heart

Body → Right Atrium

Right Atrium → Right Ventricle

Right Ventricle → Lungs (gets oxygen)

Lungs → Left Atrium

Left Atrium → Left Ventricle

Left Ventricle → Body

👉 This is called double circulation.

⚙️ Functions of the Heart

Pumps blood continuously

Maintains blood pressure

Supplies oxygen & nutrients

Removes carbon dioxide & waste

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