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