The cells on the surface of stratified squamous keratinized epithelium are very flat. Not only are they flat, but they are no longer alive. They have no nucleus or organelles. They are filled with a protein called keratin, which is what makes our skin waterproof. These dead cells are continually lost from the surface of the skin, and are replaced by new cells from the layers below. The cells on the basal (bottom) layer divide by mitosis to produce a constant supply of new cells that replace the ones that are lost from the surface. Examples of keratinized stratified squamous epithelium include skin, epidermis of the palm of the hand and sole of the foot.

   Carltilage

  pancreas

sebaceous gland associated with follicle

  testes

  liver

  examples of organs made      up of different tissues

   Specialized Connective Tissue:
        Cartilage, Bone and Blood 

      Bone

      Blood

   1. Epithelial Tissue

  3. Muscle Tissue

          hair follicle

  Nervous tissue is capable of sending and receiving electrochemical signals. Two main types of cells make up nervous tissue:
1.  Neurons receive/send information via electrochemical signals = neurotransmitters.
2. Neuroglia (glial cells) maintain homeostasis, produce myelin, and support/protect neurons. 

   Connective Tissue "Proper"

 2. Connective Tissue

       kidney tubule

    ovary

    bone marrow (red)

         Histology 

  4. Nervous Tissue

   liver

  parathyroid gland