Standards

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Standards

• 1. Cells have a distinct structure that allows
  them to have specific jobs.
• 2. Cells that are alike are organized into
  tissues.
• 3. Tissues working together form organs.
• 4. Cells, tissues and organs form systems that
  serve a specific job for the organism.

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Wanted 1. Cells that want to work alone and
be a one-celled organism

• You will work alone and perform all the jobs and
  activities necessary to keep yourself alive.

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Wanted 2. Cells that will work with others and
be a part of a multi-cellular organism

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Available Positions

• Types of positions available 200
• Positions available Between 5 and 65 trillion.

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Cell Jobs Available

• The following slides will show examples of
  available cell positions.
• You will
• Have a specific job.
• Be shaped so that you can perform your job.

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Skin Cells Requirements

• Mostly flat
• Will need to line up closely with other
• skin cells to form a protective layer for the
  body.
• Hold in body fluids.
• Keep the body waterproof.
• Keep harmful germs from getting in.

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Nerve CellsRequirements

• Long and stringlike having many branches
• Quickly receive and deliver messages from one
  part of the body to another.

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Bone CellsRequirements

• You will live surrounded by a hard substance made
  of calcium and phosphorus.

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Muscle CellsRequirements

• Long with many fibers.
• Be able to contract and relax to cause movement.

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Fat CellsRequirements

• You will store fat
• Keep the organism warm.

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Tissues

• Cells that are alike will work in groups to form
  tissues.
• Skin cells will form skin.
• Nerve cells will form nerve tissue.
• Bone cells will form bone tissue.
• Muscle cells will form muscle tissue.
• Fat cells will form fat tissue.

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Four Primary Tissue Types
1. epithelial tissue
2. connective tissue 3.
muscle tissue 4. nerve
tissue
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• Epithelial Tissue
• Job
• To line organs and help to keep the body's organs
  separate, in place and protected. 
• Examples
• outer layer of the skin
• the inside of the mouth and stomach
• tissue surrounding the body's organs

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• 2. Connective Tissue
• Job
• To add support and structure to the body. 
• Examples
• inner layers of skin
• tendons
• ligaments
• cartilage
• bone
• fat tissue. 
• blood

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• 3. Muscle Tissue
• Job-
• Be able to
• contract 
• slide past one another
• allow movement
• Examples
• All muscles

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• 4. Nerve Tissue
•   Job
• Be able to
• generate and conduct electrical signals in the
  body
• transmit signals from the brain down the spinal
  cord to the body
• Examples-
• All nerves

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Organs

• Different types of tissues work together to form
  an organ.
• Examples
• Stomach-muscle tissue, nerve tissue, blood
  tissue.
• Heart- The cells in a natural heart organ are
  lined up uniformly so they can beat together and
  pump blood. It is currently possible to grow
  cardiac cells in a laboratory, but they develop
  randomly and beat individually.
• Skin, kidney, liver, bladder, lungs, pancreas,
  colon, etc.

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Systems

• A group of organs will work together to do a
  certain job.
• Skeletal
• Muscular
• Circulatory
• Digestive
• Reproductive
• Excretory
• Nervous
• Lymphatic/Immune

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Skeletal System

• Major Role The main role of the
• skeletal system is to provide
• support for the body, to
• protect delicate internal organs
• and to provide attachment sites
• for the organs.
• Major Organs Bones, cartilage, tendons and
  ligaments.

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Muscular System

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  Circulatory System

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Digestive System