chap4 Tissues

chap4 Tissues - Chapter 4 Tissues Tissues - group of cells...

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Chapter 4 Tissues Tissues - group of cells that are similar in structure and perform a common or related function
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Four Primary Types of Tissue 1. Epithelial (Covering) 2. Connective (Support) 3. Muscle (Movement) 4. Nervous (Control) Match the above pictures within which category of tissue they belong?
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Epithelial Tissue Covers the surface of the body, lines the body cavities, forms the external and internal linings of most organs, and constitutes the bulk of most glands. Consists of two main types: 1. Covering and Lining Epithelium 2. Glandular Epithelium
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Apical Surface Basal Surface Basement Membrane Connective Tissue Body Exterior or Cavity of an Internal Organ Basal Lamina Reticular Lamina Nerve Blood Vessel Characteristics of Epithelia 1. Sheets of Closely Packed Cells 2. Tight Junctions and Desmosomes 3. Polarity 4. Supported by Connective Tissue 5. Avascular 6. Innervated 7. High Regeneration Rate
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Nomenclature for Epithelial Tissue First Word Describes the number of cell layers present Second Word Describes the shape of the cells
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Types of Epithelia 1.Simple squamous 2.Simple cuboidal 3.Simple columnar 4.Stratified squamous 5.Stratified cuboidal 6.Stratified columnar Exceptions to the nomenclature rules!! 7. Transitional epithelium 8. Pseudostratified columnar epithelium.
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Simple Squamous Epithelium You know what the structure will be from the name? What will these thin cells be useful for? Where will these processes occur? Above, the roundish structure is a ball of capillaries found in the kidneys known as a glomerulus. The blue arrow indicates the simple squamous epithelium surrounding it.
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Locations : Air sacs (alveoli) of lungs Lining of heart and all blood vessels Called the endothelium (Cut Perpendicular to their free surface) (Surface View) Functions: -- Allows passage of materials by diffusion
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Simple Cuboidal Epithelium   Function: Secretion and absorption. Connective tissue Basement membrane Simple cuboidal epithelial cells Location: Kidney tubules, ducts and secretory portions of small glands; ovary surface Apical layer often contains microvilli
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Simple columnar epithelial cell Basement membrane Connective tissue Function: Absorption; secretion of mucus, enzymes, and other substances. Simple Columnar Epithelium May contain mucus-secreting goblet cells
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Simple Columnar  Ciliated  Epithelium - Lines small bronchi, uterine tubes, some regions of uterus cilia
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Pseudostratified Columnar Epithelium - Lines respiratory passages - Every cell is in contact with the basement membrane - Nuclei at different levels and cells are different heights - Typically contain cilia cilia mucus of  globlet cell Basement  membrane connective tissue
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Pseudostratified Columnar Epithelium Pseudostratified Columnar Epithelium Cilia “sweep” the bacteria-laden mucus up the respiratory tract towards the pharynx where it can be swallowed.
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Stratified Squamous Epithelium Exposed surfaces (skin) cells of the apical layers
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This note was uploaded on 02/26/2011 for the course BIO 107 taught by Professor Smith during the Spring '11 term at NE Texas CC.

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chap4 Tissues - Chapter 4 Tissues Tissues - group of cells...

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