1. BIOLOGY
Unit 7 Notes:
Living
Organization

2. (1) Living Organization
• All living things are made of cells and
atoms/molecules.
• Levels of Organization:
– Atoms and Molecules
– Organelles and Cells
– Tissues
– Organs
– Organ Systems
– Organism

4. (2) Homeostasis
• Involuntary processes and reactions are in place to
maintain Homeostasis within cells.
• Homeostasis = Internal stability / balance.

5. (3) Nervous System
• Function:
– Controls all other organ systems + homeostasis.
– Allows you to respond to changes/stimuli.
• Made Up Of:
– Brain
– Spinal Cord
– Nerves

7. (4) Lymphatic System
• (A.K.A. The Immune System)
• Function:
– Protect body against harmful infectious agents +
compounds.
• Made Up Of:
– White Blood Cells
– Lymph Vessels, Nodes, and Fluid

9. (5) Cardiovascular System
• Function:
– Work with the respiratory system to circulate gases.
– Pump nutrients throughout the body to working
tissues.
• Made Up Of:
– Heart
– Blood Vessels
– Blood + Blood Cells

11. (6) Respiratory System
• Function:
– Work with the cardiovascular system to circulate gases.
– Bring oxygen into body + expel carbon dioxide.
• Made Up Of:
– Nasal Cavity
– Lungs
– Diaphragm

13. (7) Skeletal System
• Function:
– Provide body support and mobility.
– Protect organs.
• Made Up Of:
– Bones
– Joints
– Cartilage

14. (8) Muscular System
• Function:
– Body + Organ mobility.
– Produce body heat.
• Made Up Of:
– Muscle
– Ligaments + Tendons

16. (9) Digestive System
• Function:
– Break food into smaller pieces.
– Metabolize biomolecules within food.
– Absorb useful nutrients + expel waste.
• Made Up Of:
– Oral Cavity + Esophagus
– Stomach
– Small + Large Intestine
– Rectum + Anus

17. (10) Excretory System
• (A.K.A. The Urinary System)
• Function:
– Filter Blood.
• Made Up Of:
– Kidneys
– Ureters
– Bladder
– Urethra

19. (11) Reproductive System
• Function:
– Pass genes on to produced offspring.
• Made Up Of:
– Male  Sperm, Testes, Penis
– Female  Eggs, Ovaries + Uterus, Vagina