HUMAN BODY SYSTEM

-Dipankar Dey

Cells – the basic unit of life

Tissues – clusters of cells performing a similar function

Organs – made of tissues that perform one specific

function

Organ Systems – groups of organs that perform a

specific purpose in the human body

consisting of many billions of cells as well as components

outside of the cells.

Human Body Contains 11 organ systems…

HUMAN BODY

1. NERVOUS SYSTEM

A. Central Nervous System :

a. Brain,

b. Spinal cord &

c. Nerves.

B. Peripheral Nervous System :

a. Neurons,

b. Ganglia &

c. Nerves .

2. RESPIRATORY SYSTEM

3. CIRCULATORY SYSTEM

Artery :

Blood vessel that carries blood

away from the heart and toward

other tissues and organs.

Arteries deliver oxygen and

nutrients to every cell of the

body.

Vein:

Blood vessels those carry

blood that is low in oxygen

content (Deoxygenated blood)

from the body back to the

heart.

4. INTEGUMENTARY SYSTEM

5. MUSCULAR SYSTEM

A. Visceral Muscle:

found inside of organs like

Stomach,

Intestines &

Blood vessels.

B. Cardiac Muscle:

found in the Heart.

C. Skeletal Muscle:

are attached to bones

through tendons.

6. SKELETAL SYSTEM

The adult

human

skeletal

system

consists of

206 Bones,

as well as a

network of

Tendons,

Ligaments &

Cartilage.

7. ENDOCRINE SYSTEM

Collection of glands that produce hormones that regulate:

• Metabolism,

• Growth & Development,

• Tissue function,

• Sexual function,

• Reproduction,

• Sleep,

• Mood, etc.

8. EXCRETORY SYSTEM

Responsible for the elimination of wastes

9. REPRODUCTIVE SYSTEM

New life begins when an egg from a woman is fertilised by sperm from a man.

10. DIGESTIVE SYSTEM

A group of organs working together to convert food into basic

nutrients, which the body uses for energy, growth and cell repair.

11. IMMUNE SYSTEM

Balanced state of having adequate biological defences to fight

infection, disease, while having adequate tolerance to avoid allergy

and diseases.

Immunity

White Blood Cells

• made in the bone marrow.

• move through blood and tissue.

• Every time a microbe (germ) is overcome, the immune system

remembers that microbe.

• The immune system also produces proteins called antibodies

that can help neutralise infection or the toxins.

11. IMMUNE SYSTEM

A. Active Immunity:

a. Natural active immunity -- acquired due to infection

b. Artificial active immunity – vaccination

B. Passive Immunity:

a. Natural passive immunity-- A mother’s antibodies pass across

the placenta to the foetus and remain for several months.

b. Artificial passive immunity – Used when a very rapid immune

response is needed e.g. after infection with tetanus.

Fever:

A rise in body temperature, or fever, can

happen with some infections. This is actually an

immune system response.

A rise in temperature can kill some microbes.

Thank You