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Kinds of Cells

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White Blood Cells
    White blood cells, or leukocytes, smell out and track bacteria like blood hounds smell out criminals.  They kill them before they make you sick.  They fight off disease and produce antibodies to help them.  The five types of white blood cells are lymphocytes, monocytes, neutrophils, basophils, and eosinophils.  The number of white blood cells increase when there is a disease in your body.  White blood cells only live for a few days to two weeks.  If another cell is carrying the disease, a T-cell, a kind of white blood cell, will attack the cell.
Click here to learn about the Rhinovirus.

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Red Blood Cells

      Red blood cells carry hemoglobin and they carry oxygen to the other cells in the body.
     Click here to learn about Sickle Cell Anemia
Click here to learn about Artificial Cells

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Nerve Cells

    Nerve cells run to every part of the body from your foot to your head and carry information to other parts of your body.  They are grouped together and are shaped like a rope.  The average nerve cell is only about three feet long.  Nerve cells have chemical transmitters called neurotransmitters.  The brain has about 100 billion neurons.  The dendrites of the nerve cell take in messages and the axons give out information. 
    Nerve cells are like transport systems because they take in and deliver messages and commands to different parts of the body.  A transport system takes in and delivers messages and commands to different arts of the cell. 

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Muscles Cells

      Muscle cells cause movement. There are two types of fibers, Actin and Myosin, in a muscle cell that cause contractions by sliding up and down. 
     Some muscles work all the time, but other muscles only work when you are doing a certain activity.    The three types of muscles are skeletal, smooth, and cardiac.  The skeletal muscle is striped and it moves bones.  Smooth muscles line blood vessels, the stomach, the digestive tract, and other organs.  Cardiac muscles are in-between the skeletal muscle and smooth muscles.



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Bone Cells

     The three types of cells found in the bone are: osteoclasts, osteocytes, and osteoblasts.  Osteo is the Greek word for bones.  Osteoclasts dissolve the bone and are very large.  They have more than one nucleus and are somewhat related to white blood cells. 
     Osteocytes are found inside the bone and come from osteoblasts.  They can sense when the bone is cracked so then the osteoclasts can come to dissolve the bone. 
     Osteoblasts form a new bone and work in teams to do this job.  They are on the surface of the bone. The other osteoblasts that are older are called lining cells.  They manage the calcium and mineral deposition.   
Connection to School

     As you will learn or have learned, cell organelles can be connected with things in a school.  These kinds of cells can be thought of as different schools.  When differents types of cells come together they form a system, so this could be like different schools that come together to form a school system.
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