The heart is a fist-sized organ located in the chest that pumps blood throughout the body via the circulatory system. It contains four chambers - two upper atria and two lower ventricles - made of muscle tissue powered by electrical impulses. The heart pumps oxygenated blood received from the lungs to all parts of the body and returns deoxygenated blood back to the lungs to be re-oxygenated. Key functions of the heart include pumping oxygen and nutrients to the body and removing carbon dioxide and waste. Arteries carry oxygen-rich blood away from the heart while veins return blood to the heart from other tissues and organs.

1. M Saleh Samejo
Heart
The heart is a fist-sized organ that pumps blood
throughout your body. It's the primary organ of
your circulatory system. Your heart contains
four main sections chambers made of muscle
and powered by electrical impulses. Your brain
and nervous system direct your heart's function.
 Funcition of heart:
It pumps blood around your body as your heart
beats. This blood sends oxygen and nutrients to
all parts of your body, and carries away
unwanted carbon dioxide and waste products.
 Pumping oxygenated blood to other body parts.
 Circulating hormones and other essential
substances to different parts of the body.
 Receiving oxygen-poor blood and pumping to the
lungs for oxygenation, transporting waste products
from the body.

2. M Saleh Samejo
Define:
Artery:
A blood vessels that distribute oxygen-rich
blood to your entire body.
Vein:
A blood vessel that carries blood to the heart from
tissues and organs in the body.
Pulmonary Artery:
The pulmonary arteries function to transport
deoxygenated blood from the right side of
the heart to the lungs for oxygenation.
Pulmonary Vein:
Pulmonary veins are blood vessels that
carry oxygen-rich blood from your lungs to
your heart.
Arota:
The largest artery of the body and carries
blood from the heart to the circulatory
system.
Superior vena cava:
The large vein that carries blood from the
head, neck, arms, and chest to the heart.

3. M Saleh Samejo
Difference:
NO: Artery Vein
1: Carries blood away
from heart to tissue of
the body.
Carry blood from
tissue of body to the
heart.
2: Are more muscular
than| veins.
Are less muscular than
arteries.
3: Would generally
remain open even if
flow stops because of
the muscular
structure.
Collapse if blood flow
stop.
Diagram of heart

4. M Saleh Samejo
Thank
s

5. M Saleh Samejo
The
End