Human Body Orientation Unit 1a

6 levels of structural organization

1)Atoms-molecules(chemical level)

2)Cells(cellular level)

3)Groups of similar cells(tissue level)

4)Groups of tissues(organ level)

5)Groups of organs(organ system level)

6)Organism

11 body system

1)Integumentary-skin

2)Skeletal-bones

3)Muscular-Deltoid 

4)Nervous-Nerves

5)Endocrine-thyroid

6)Cardiovascular-heart

7)Lymphatic-Lymph nodes

8)Respiratory-Lungs

9)Digestive-Stomach

10)Urinary-Bladder 

11)Reproductive-Uterus

8 functions that humans must preform to sustain life

• Breathe

• Eat

• Digest

• Excrete

• Circulate blood

• Metabolize food and other things

• Maintain homeostasis

• reproduce 

5 survival needs of the human body

• nutrients

• oxygen 

• water

• atmospheric pressure

• normal body temperature

negative feedback

returning to a balanced state

postive feedback

continuously adding something