MULTICELLULAR�ORGANISMS

UNDERSTANDING LIFE SYSTEMS CELLS

3.5  identify unicellular organisms �(e.g., amoebae) and multicellular organisms �(e.g., invertebrates [worms], vertebrates [frogs]), �and compare ways in which they meet their basic needs �(e.g., nutrition, movement, gas exchange)

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CURRICULUM

UNDERSTANDING LIFE SYSTEMS CELLS

3.6  describe the organization of cells into tissues, organs, and systems �(e.g., groups of cells with similar functions combine to make up tissues; groups of tissues with similar functions combine to make organs; groups of organs work together as organ systems)

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CURRICULUM

ORGANISMS CAN BE �MULTICELLULAR or UNICELLULAR

(many cells)

(only one cell)

e.g. humans, plants, etc.

e.g. bacteria

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MULTICELLULAR�ORGANISMS

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LEVELS OF ORGANIZATION

https://www.youtube.com/watch?v=ZRFykdf4kDc

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MULTICELLULAR ORGANISMS

Cells become different through the process of CELLULAR DIFFERENTIATION

cells become specialized to �perform different functions

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MULTICELLULAR ORGANIATION

cells combine together to form tissues which combine together to form organs which combine together to form �organ systems which combine together to form a body

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MULTICELLULAR ORGANIATION

• TISSUE: a group of differentiated cells that work together to perform a function
• ORGAN: two or more tissues that work together to perform one or more functions
• ORGAN SYSTEM: a group of organs that work together to perform related functions

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LEVELS OF MULTICELLULAR ORGANIATION

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LEVELS OF MULTICELLULAR ORGANIATION

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• Cellular Differentiation
• Cells
• Tissues
• Organs
• Organ Systems
• Body

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