Human body system: A system of human body means a collective functional unit made by several organs in which the organs work in complete coordination with one another. Organs cannot work alone because their are certain needs of every organ that need to be fulfilled and the organ itself cannot fulfill those needs. So all organs of human body need the support of other organs to perform their functions and in this way an organ system is formed. 1. Integumentary system -largest sensory organ -vitamin D syntheses -protects deeper tissue -regulates fluid and blood loss  2. skeletal system -stores calcium -frame work for the body -protects vital organs -produces red blood cells  3. muscular system -generates heat -creates movement -maintains posture -uses energy  4. Immune System -portions of many different systems that fight disease  5. Reproductive System -production off spring -production of hormones  6. cardiovascular System -transportation of nutrients and gas waste -supports immune function  7. urinary system -get rid of nitrogenous waste out of blood -regulated electrolytes, fluid and pH balance  8. Digestive system -breaks down food into the building blocks for the body  9. respiratory system -portions moistens and heats air -gas exchange  10. nervous system -sensory input -interpretation of input or thought -elicit and signal responses -coordination of muscles  11. endocrine System -secrets hormones that regulate growth, metabolism and general body function. 

1. HUMAN BODY SYSTEM
-Dipankar Dey

2. 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

3. 1. NERVOUS SYSTEM
A. Central Nervous System :
a. Brain,
b. Spinal cord &
c. Nerves.
B. Peripheral Nervous System :
a. Neurons,
b. Ganglia &
c. Nerves .

4. 2. RESPIRATORY SYSTEM

5. 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.

6. 4. INTEGUMENTARY SYSTEM

7. 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.

8. 6. SKELETAL SYSTEM
The adult
human
skeletal
system
consists of
206 Bones,
as well as a
network of
Tendons,
Ligaments &
Cartilage.

9. 7. ENDOCRINE SYSTEM
Collection of glands that produce hormones that regulate:
• Metabolism,
• Growth & Development,
• Tissue function,
• Sexual function,
• Reproduction,
• Sleep,
• Mood, etc.

10. 8. EXCRETORY SYSTEM
Responsible for the elimination of wastes

11. 9. REPRODUCTIVE SYSTEM
New life begins when an egg from a woman is fertilised by sperm from a man.

12. 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.

13. 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.

14. 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.

15. Thank You