Tissue Types

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6 Terms

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Tissue

A group of cells found together in the body

2
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Types of Tissue

  1. Epithelial Tissue

  2. Connective Tissue

  3. Muscle Tissue

  4. Nervous Tissue

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Epithelial tissue

Sheets of cells found on the outer surfaces of the body (skin) or glands

  • Joined by cell junctions - cells directly connected to one another

  • All substances must enter and exit through the epithelium

Apical-Basolateral Polarity - The cell’s top and bottom structure differ

  • Apical surface: ‘top’ surface facing the ‘outside’

  • Basolateral surface: ‘bottom’ that faces underlying tissue

<p>Sheets of cells found on the outer surfaces of the body (skin) or glands</p><ul><li><p>Joined by <strong>cell junctions - </strong><em>cells directly connected to one another</em></p></li><li><p><strong>All substances must enter and exit through the epithelium</strong></p></li></ul><p><em><mark data-color="red" style="background-color: red; color: inherit">Apical</mark>-<mark data-color="blue" style="background-color: blue; color: inherit">Basolateral</mark><mark data-color="yellow" style="background-color: yellow; color: inherit"> Polarity</mark></em><mark data-color="yellow" style="background-color: yellow; color: inherit"> - The cell’s top and bottom structure differ</mark></p><ul><li><p><mark data-color="red" style="background-color: red; color: inherit">Apical surface</mark>: ‘top’ surface facing the ‘outside’</p></li><li><p><mark data-color="blue" style="background-color: blue; color: inherit">Basolateral surface</mark>: ‘bottom’ that faces underlying tissue</p></li></ul><p></p>
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Connective tissue

Cells dispersed within a non-cellular matrix

  • Functions to connect, protect and support other tissues

3 Types:

  1. Connective tissue proper:

    a. Loose connective tissue (adipose tissue)

    b. Dense connective tissue (tendons/ligaments)

  2. Supportive connective tissue (cartilage & bone)

  3. Fluid connective tissue (blood & lymph)

<p>Cells dispersed within a <em><u>non-cellular matrix</u></em></p><ul><li><p>Functions to <strong>connect, protect and support</strong> other tissues</p></li></ul><p>3 Types:</p><ol><li><p><mark data-color="yellow" style="background-color: yellow; color: inherit">Connective tissue proper</mark>:</p><p>a. <strong>Loose</strong> connective tissue (adipose tissue)</p><p>b. <strong>Dense</strong> connective tissue (tendons/ligaments)</p></li><li><p><mark data-color="blue" style="background-color: blue; color: inherit">Supportive connective tissue</mark> (cartilage &amp; bone)</p></li><li><p><mark data-color="red" style="background-color: red; color: inherit">Fluid connective tissue</mark> (blood &amp; lymph)</p></li></ol><p></p>
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Muscle Tissue

Excitable contractile tissue. Can be electrically stimulated and can contract.

3 Types:

  1. Skeletal muscle tissue

    • Majority is attached to the skeleton

    • All skeletal muscle tissue can be voluntarily moved

    • Produces head to protect organs

  2. Smooth muscle tissue

    • Muscle of internal organs

    • Involuntary control

  3. Cardiac muscle tissue

    • Heart muscles that pump blood

    • Involuntary control

<p>Excitable contractile tissue. Can be electrically stimulated and can contract.</p><p>3 Types:</p><ol><li><p><mark data-color="green" style="background-color: green; color: inherit">Skeletal muscle tissue</mark></p><ul><li><p>Majority is attached to the skeleton</p></li><li><p>All skeletal muscle tissue can be voluntarily moved</p></li><li><p>Produces head to protect organs</p></li></ul></li><li><p><mark data-color="yellow" style="background-color: yellow; color: inherit">Smooth muscle tissue</mark></p><ul><li><p>Muscle of internal organs</p></li><li><p>Involuntary control</p></li></ul></li><li><p><mark data-color="red" style="background-color: red; color: inherit">Cardiac muscle tissue</mark></p><ul><li><p>Heart muscles that pump blood</p></li><li><p>Involuntary control</p></li></ul></li></ol><p></p>
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Nervous Tissue

Excitable, non-contractile tissue. Can be electrically stimulated but cannot contract.

  • Sends & receives chemical and electrical signals

2 Types:

  1. Neurons - Propagates signals through the nervous system

  2. Neuroglia - Supports neuron function

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