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What are the six levels of organization?
1. Chemical
2. Cell
3. Tissue
4. Organ
5. Organ System
6. Organism
Define the chemical level of organization
The chemical, mechanical, and electrical events that occur between and within cells.
Atoms combine to form molecules and molecules combine to form macromolecules.
10^27 molecules in our body.
Define the cellular level of organization
The fundamental compartments of all known living organisms and the molecules and
organelles within working together. About 200 different cell types. 75 trillion cells in our
body.
Define the tissue level or organization
Group of cells working together in a concerted manner.
, Define the Organ level of organization
Groups of tissues working together to perform specific functions. About 79 organs in the
body.
Define the organ system level of organization
Groups of organs working together. 11 organ systems.
Define the organism level of organization
All the simpler levels working together to sustain life.
What are the major organs of the integumentary system?
Skin, hair, nails, sweat glands
What are the main functions of the integumentary system?
Protection from environmental hazards
sensory information
regulation of body temperature
What are the major organs of the skeletal system?
Bones, cartilages, associated ligaments, bone marrow
What are the functions of the skeletal system?
Provide structural framework
supports and protects tissues
stores calcium and other minerals
forms blood.
What are the major organs of the muscular system?
Muscles, tendons
What are the functions of the muscular system?