Human Tissues

Human Tissues

1. Definition of Tissues: group of cells that have similar structure and that function together as a unit.

2. Four types of Tissues

   • Muscular Tissues
   • Epithelial Tissues
     • General Characteristics
       • Avascular, but innervated
     • Simple Squamous
       • Function: absorption and filtration processes
         • Location: blood and lymphatic vessels, air sacs of lungs, lining of the heart Function: secrets lubricating substance, allows diffusion and filtration
           • pictures
     • Simple Cubical
       • Function: absorption and filtration processes
         • Location: secretory ducts of small glands, kidney tubules Function: allows secretion and absorbtion
     • simple columnar;
       • Function: secretes acid, digestive enzymes and mucous.
         • located in the stomach
     • protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception.
     • pseudostratified
       • Function: absorption and filtration processes
         • Location: trachea and most of the upper respiratory tract (ciliated cells) Function: secretes mucus which is moved with cilia
   • Nervous Tissue
   • Connrctive tissue

3. credita: https://www.histology.leeds.ac.uk/tissue_types/epithelia/epi_simple.php

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