the organization of living things
TRANSCRIPT
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THE ORGANIZATION THE ORGANIZATION OF LIVING THINGSOF LIVING THINGS
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BENEFITS OF BEING MULTICELLULAR
• Larger Size: larger organisms are prey for fewer predators. Also, large predators can eat a wider variety of prey
• Longer Life: not limited to the life span of any single cell
• Specialization: each type of cell has a particular job. This makes the organism more efficient!
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EXAMPLE:
Cardiac Muscle Cell
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• Level 1: Cell• -smallest unit that can perform life processes independently• -vary in size and shape• -Example: plant cell (square) and animal cell (round)
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LEVEL 2: TISSUECELLS WORKING TOGETHER
• Tissue: a group of cells that work together to perform a specific job
Animals have 4 basic types of tissues:1. nerve tissue
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2. muscle tissue
3. connective tissue
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4. Protective Tissue
Example: Adipose (fat) cells in the skin
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PLANT TISSUES
• Plants have 3 types of tissue:
1. transport tissue2. protective tissue
(dermal)3. ground
tissue
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LEVEL 3: ORGANTISSUES WORKING TOGETHER
•Organ = a collection of tissues that carry out a specialized function of the body• Example: heart
- has mostly cardiac tissue, but also has nerve tissue and tissues of the blood vessels that all work together•Other examples: stomach, intestines, brain, and lungs
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• Examples in plants: the leaf plant organ that contains tissue that traps light energy to make food• Also: stems and roots
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IS THAT A FACT?!
In your lifetime, your body will shed
about 40 pounds of dead skin!
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LEVEL 4: ORGAN SYSTEMORGANS WORKING TOGETHER
• Organ system = group of organs that work together to perform body functions• Examples: digestive
system, which includes several organs, such as the stomach and intestines
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ON ITS OWN: ORGANISM
• Organism = a living thing; anything that can carry out life processes independently• An organism can be unicellular, like this bacteria:
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•OR an organism can be multicellular, like you!
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STRUCTURE & FUNCTION
• In organisms, structure and function are related.Structure = arrangement of parts in an organization
-Includes the shape of a part and the material of which the part is made
Function = the job that the part does
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EXAMPLE OF STRUCTURE AND FUNCTION:
The structure of the lungs is a large, spongy sac. Blood vessels wrap around aveoli (air sacs). The structure of the aveoli and blood vessels enable them to perform a function, which is bring oxygen into the body and take out carbon dioxide.
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REVIEW:1. A ____________ is the most basic unit of all living
things.
2. The job that an organ does is the _________ of that organ.
3. A group of cells working together to perform a specific function is a ______.
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ANSWERS:
• 1. cell• 2. function• 3. tissue