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					     P2- The main tissue types of the body and the role these play in tow
                         named organs in the body




Parvana Huseinova
                     Epithelial Tissue
What is epithelial tissue?
this is when the tissue covers the surface of the body. This is made up with cells
    that are closely combined and have more than one layer. It covers the lining or
    external and internal surfaces of the body.


The epithelial tissues are very tight and have no space between them and if they
  do it is something really small. The epithelial tissue helps protect underlying
  tissue from harmful chemicals bacteria invading and also water loss.



There are two parts to the epithelial tissue simple and compound.
  Simple is a single layered tissue which rest on the bottom of the membrane.
  Compound is when there is more than 2 layers and the deepest layer is at the
   bottom of the membrane.



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              Simple Cuboidal Epithelium.

        Cuboidal epithelium are square or cuboidal shape. The
        cells have spherical nucleus in the centre. It is found in
        glands and the lining of the kidney and also creates a
        covering for the ovaries. This layers organs to help
        protect them.




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             Simple Columnar Epithelium

•   Columnar epithelium is usually in a Colum shape. It is found in the lining of
    the stomach and intestines. Also in the throat it helps push the mucus to the
    top of your throat to trap out mucus. The main function of the columnar is
    the protect. It makes a barrier in the stomach and intestines to trap out
    bacteria getting in.




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           Simples squamous epithelium.

•   Squamous epithelium is a thin flat square shape. They are tightly held
    together. The simple squamous epithelia helps to decide what is able to
    move from the lumen and into the bloodsteam. It is found in the mouth heart
    and lungs.




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                    Simple Ciliated Epithelium

•   Simple ciliated epithelium is a rectangle shape with and it has lots of hairs
    on top which is called the cilia. Ciliated epithelial cells are found in the
    tracheal and bronchial. It helps keep away mucus.




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        Compound keratinized epithelium


•   This refers to the out layer of the skin cells when they become hard and die.
    This layer protects the tissues underneath and it stops substances passing
    in. keratinized epithelium is found in animal cells.




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                       Muscle Tissue
                                                  Skeletal muscle- it is attacked to
  Cardiac muscle- this is found in the            the skeleton. It is striated for
  heart. It is self controlling. It is            pulling and is fast and powerful.
  striated. Also it is fast and powerful.         It is cells from fibres with
                                                  several nuclei. It is voluntary.



                         Smooth muscle- they are found in
                         blood vessels, the stomach,
                         intestines, and bladder. Smooth
                         muscles are involuntary. Its is slow.




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                      Connective tissue
Blood- it transports oxygenated and        Cartilage- is a form of
deoxygenated blood in and around the       connective tissue, it is a tough
body.                                      flexible tissue, it provides
                                           support and structure for the
                                           body. It Is found in bones of
Bone- bones help support the
                                           the body.
body and protect organs.



 Areola- is an elastic fiber cell. It is      Adipose- found in
 strong enough to bind tissue types           mammals, it is fat that
 together but soft and still provides         helps cushion the body.
 cushioning. It is found in the nipple
 and around the eye.



  Parvana Huseinova
                     Nervous Tissue
•   These are cells that help you sense and respond to changes in the
    environment like light, pressure and chemicals in food. There are two types
    of nervous tissues.
•   Neurones- they carry information from the brain around the body. It signals
    your brain when you want to do something and you get a fast response.
    This called a reflex action.




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posted:12/4/2011
language:English
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