Question

section of human heart picture

Answer 1

The heart is a pump, which moves the blood. The arteries and veins are the pipes through which the blood flows. The lungs provide a place to exchange carbon dioxide for oxygen. The heart is a hollow, muscular organ, which functions as a pump for the movement of blood through the body.
Each part of the heart has a distinct function, but all the parts must work together seamlessly and simultaneously to keep blood moving through your body.

Atria. ...

Ventricles. ...

Septum. ...

Valves. ...

Putting It All Together: Right Side. ...

Putting it All Together: Left Side.

Answer 2

$\huge\textbf{Human Heart :}$

→ Heart is a hollow, muscular organ present between two lungs in thoraric cavity, slightly towards left.

→ It's size is about one's fist. It's weight is 300 gm in males and 250 gm in females. It is 12 cm long, 6 cm thick and 9 cm wide. 

→ It is protected by a double membrane called pericardium.

→ It's upper broad portion is known as base and lower portion is known as apex.

→ It is Redish-brown in colour. 

{Diagram is in Attachment !!}
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