Systems of the human body

Skeletal

• Frame work - support

• Protection

• Movement

• Red blood cell production

• Storage of minerals

Muscular

• Provide a pulling force to create movement

• Involuntary muscles

• Voluntary muscles

• Muscles need nervous stimulus

• Need a great supply of blood keeping a constant supply of 02 and energy

Nervous

• The brain, spinal cord and nerve branches

• Controls all bodily movements

• The brain receives sensory input from the external environment and internal environment

• Works with the endocrine system to monitor and maintain other bodily systems

Endocrine• Glands and cells - Produce

chemicals called hormones

• Circulate in the blood and other bodily fluids

• Maintain our internal environment

• Long term effects - Growth, puberty and reproductive activity

• Close links with the nervous system

Cardiovascular

• Heart

• Pumps blood around the body

• Supplies the body with oxygen and nutrient rich blood

• Waste products are removed when the blood leaves

• Transportation - blood, nutrients, hormones and immune cells

Respiratory• The movement of air moving into

and out of the lungs

• Volume and pressure change within the two cavities of the body - Thoracic and abdomen

• Deep inside the lungs gaseous exchange takes place

• 02 inhaled C02 exhaled

• Secondary function - Vocilisation

Skin, hair, nails

• Outer protective layer

• physical injury, microorganisms and radiation

• regulates body temperature

• Fat under the skin acts as an insulator and shock absorber

Lymph and immunity

• Provides residence to threats including infectious diseases and malfunction of internal processes

• Distributes nutrients and removes waste

• Delivers immunity - white blood cells when needed

Digestive• 9 metres of tubing

• Mouth - anus

• Chops up food, stores and digests it, eliminates waste, passes nutrients to the liver

• Good function of the digestive system relies on the immune and nervous system

Urinary• Urine eliminates waste from

the blood

• Urine is formed by the kidneys

• Urine production is controlled by hormones

• Influenced by blood flow and pressure, intake of water, fluid loss, nutrients, temperature, sleeping and walking

Reproductive• Differs dramatically from male to female

• Is not vital for maintaing life

• production of sperm is continual and production of eggs in females is cyclical

• links - endocrine system