Transcript Human Body Systems

Human Body Systems
Levels of Organization
1- cells
2- tissues
3- organs
4- organ systems
5- organism
Each system works together to
help us function and survive
Skeletal System
Skeletal System
• The framework of your body and it is made
of 206 living bones (300 in babies)
5 Functions of the skeletal system
1. Gives shape and support to your body
2. Protects your internal organs
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3. Muscles attached to your bones help you
move
4. Marrow in the center of bones makes
blood cells (2.5 million/second)
5. Bones store calcium and phosphorus for
our body
- Ca helps our heart and muscles work
- P helps our cells produce and store energy
- When stored in our bones, Ca and P help make bones
stronger
Muscular System
Over 600 muscles make movement
possible
2 Functions of the Muscular
System
1. Helps your body move
2. Produces heat for your body (through
exercise or shivering)
Integumentary System
• Our largest system, made up of one
organ:
– Skin
4 Functions
1. Protection
2. Sensory
Response
3. Vitamin D formation
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4. Maintain body temperature- using blood
vessels constricting and sweating
Digestive System
Helps provide energy for our body
1 Function:
• Break down food into small molecules so it
can be absorbed and moved by the blood
stream which delivers it to your cells for
energy.
Circulatory System
A delivery system
2 Functions
1. Blood delivers nutrients
(food) and oxygen to cells so
they can function.
2. Blood removes waste products, like
carbon dioxide, from cells.
Respiratory System
Exchanges air
1 Function
– Supplies body with
fresh oxygen
(needed by cells)
and removes
carbon dioxide
(waste product)
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Both circulatory and respiratory
systems work closely together
Excretory System
Any system that eliminates wastes
Included in excretory system
are:
• Digestive-water and
undigested food out
• Respiratory- carbon
dioxide and water out
• Skin-sweat and salts
out
• Urinary-water,
metabolic wastes and
salts out
Urinary System: Function
• It filters your blood and removes wastes
produced by your cells
• Fluid levels in the body are also
maintained by the urinary system
Nervous System
A control system
Function
• Allows your body to react to your
environment and stimuli.
Endocrine System
A control system for your body
Functions
• Uses chemicals (hormones) to:
a. Regulate internal environment
Functions
b. Adapt to stressful situations
Functions
c. Promote growth and development
Functions
d. Coordinate circulation, digestion, and
absorption of food.