Organization of Organisms

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Presentation transcript:

Organization of Organisms Objective 41

Objective 41: I can describe the hierarchical organization of multicellular organisms

Specialized Cells: Cells are the smallest unit of LIVING things. Cells that perform specific functions in multicellular organisms (muscle cells, skin cells, brain cells – all have different functions and jobs)

Tissues A group of specialized cells working together for a specific function. Examples: Muscle Tissue Nervous Tissue Connective Tissue Epithelial tissue

Organs A group of similar tissues that perform a similar, specific, and often complex function Examples Heart Liver Kidneys Brain Stomach Skin

Organ System A group of organs that work together to perform a major function The human body as over 9 different major organ systems Examples: Nervous System Circulatory System Respiratory System Digestive System Excretory System Immune System Muscular System Skeletal System Endocrine System

Multi-Cellular Organisms Several organ systems working together to perform life functions make up a multi-cellular organism.

Hierarchy of Multicellular Organisms Specialized Cells Tissues Organs Organ Systems Organism