biology: organ systems overview
What is a tissue? Organ? Organ system?
-Tissue: made up of cells -Organ: made up of tissues with a common function/structure -Organ System: made up of organs with a common function
Organizational scheme of biology
-atom -molecule -cell -tissue -organ -organ system -organism
Major Types of Tissue and their Functions
1. Muscle: movement 2. Connective: connect 3: Nervous: signal 4. Epithelial: lining for protection or absorption/secretion
List of Body Systems
1. Nervous 2. Excretory 3. Circulatory 4. Reproductive 5. Digestive 6. Muscular 7. Respiratory 8. Skeletal 9. Integumentary 10. Immune 11. Lymphatic 12. Endocrine
Digestive System Function
breaking down and absorbing nutrients
Respiratory System Function
bringing in O2 and removing CO2
Circulatory System Function
circulating nutrients and waste
Immune System
fights infection
Lymphatic System
fights infection
Muscular System Function
movement
Integumentary System Function
protection from the outside
Endocrine System
regulates and controls body
Nervous System Function
regulating and coordinating the body
Excretory System Function
removes waste
Reproductive System Function
reproduce
Skeletal System Function
structure/support
