M2L1A

Evaluating Tissues

Nervous Tissues

Epithelial Tissues

Functions of Epithelial Tissue

  • Protection

    Epithelial cells from the skin protect underlying tissue from mechanical injury, harmful chemicals, invading bacteria and from excessive loss of water.

  • Sensation

    Sensory stimuli penetrate specialised epithelial cells. Specialised epithelial tissue containing sensory nerve endings is found in the skin, eyes, ears, nose and on the tongue.

  • Secretion

    In glands, epithelial tissue is specialised to secrete specific chemical substances such as enzymes, hormones and lubricating fluids.

  • Absorption

    Certain epithelial cells lining the small intestine absorb nutrients from the digestion of food.

  • Excretion

    Epithelial tissues in the kidney excrete waste products from the body and reabsorb needed materials from the urine. Sweat is also excreted from the body by epithelial

Right for the Spot!

Epithelial Tissue is at the right location because without it all of the other tissues would be damaged because the outsides of our bodies are not protected. Epithelial protects us from physical and chemical harm and releases anything harmful in our body. Our body would also be weak without epithelial tissues adsorbing nutrients and ridding us from disgusting waste products.

Connective Tissues

Function

Connective tissues function primarily to support the body and to bind or connect together all types of tissue. This tissue also provide a mechanical framework which plays an important role in locomotion. Connective tissue is characterized by the large amounts of inter-cellular substance that it contains.

Muscle Tissue

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Muscles can be divided into three main groups, Smooth, Skeletal, & Cardiac

Smooth

  • Smooth muscle controls slow, involuntary movements such as the contraction of the smooth muscle tissue in the walls of the stomach and intestines.
  • The muscle of the arteries contracts and relaxes to regulate the blood pressure and the flow of blood.


Skeletal

  • Skeletal muscles are directly involved in the breathing process.


Cardiac

  • Cardiac muscle tissue plays the most important role in the contraction of the atria and ventricles of the heart.
  • It causes the rhythmical beating of the heart,
  • Circulating the blood.