LEVEL OF BODY ORGANIZATION

• Atom - 1
• Molecule - 2
• Macromolecule - 3
• Organelle - 4
• Cell -5
• Tissue - 6
• Organ - 7
• Organ system - 8
• Organism - 9
• Cells - Smallest, most basic

  unit of life.

  -Each type of specialized cell has its own job to do.

  -Blood cells carry O2 to all parts of the body.

  -Lung cells make mucus

  that traps particles.

  and protects the lungs

  from bacteria and

  viruses
• Tissues - Groups of cells

  working together to perform a specialized function

  Four types of tissue:

  1.Epithelial (skin and lining of many organs)

  2. Connective (ligaments and tendons)

  3. Muscle

  4. Nervous
• Organs - A group of tissues

  working together to perform a similar function.

  Examples:

  -Heart

  -Lungs

  -Liver

  -Stomach
• Organ Systems -Two or more organs working together.

  Example:

  Lungs, sinuses,

  nasal passages,

  pharynx, and larynx

  make up your

  respiratory system.
• Organism - Together, all of

  the organ systems make up an organism.