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What are tissues
Groups of cells similar in structure and function
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what are the types of tissues
- Epithelial tissue
- Connective tissue
- Muscle tissue
- Nerve tissue
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the function of epithelial tissue is
to protect the exposed portions of the body's organs and safeguard them from injury abrasion and injury.
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Where is epithelial tissues found
on the surfaces of body organs
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the 1st type of epithelial tissue is
simple squamous epithelium
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describe simple squamous epithelium
- is a single layer of flat cells that lines the blood vessels, air sacs of the lungs, and portions of the kidney...
- it is attached to a basement membrane...
- the nucleus is at the center of the cells...
- in the heart & blood vessels it is called endothelium while in the abdominal cavities its called mesothelium....
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what is the function of simple squamous epithelium
filter and exchange
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what is the 2nd type of epithelial tissue
simple cuboidal
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what is the function simple cuboidal epithelium
it secretes various substances and is used for protection
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describe simple cuboidal epithelial
single layered of cubed-shaped cells found in the kidney tubules and many excretory glands
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what is the 3rd epithelial tissue
simple columnar epithelium
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describe simple columnar epithelium
found in the gastrointestinal tract from stomach to the anus and in ducts of many glands simple columnar epithelium is single layer of tall cylindrical cells with the nuclei occurring at the base of the cell
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Function and location of nervous tissue
- Internal communication
- Brain, spinal cord, and nerves
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Function and location of muscle tissue
- Contracts to cause movement
- Muscles attached to bones (skeletal)
- Muscles of heart (cardiac)
- Muscles of walls of hollow organs (smooth)
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location and function of Epithelial tissue:
- Forms boundaries between different environments, protects, secretes, absorbs, filters
- Skin surface (epidermis)
- Lining of GI tract organs
- other hollow organs
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function and location of Connective tissue
- Supports, protects, binds other tissues together
- Bones Tendons
- Fat and other soft padding tissue
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two main types of Epithelial Tissue (Epithelium) by location
- 1.Covering and lining epitheliaOn external and internal surfaces
- 2.Glandular epitheliaSecretory tissue in glands
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Characteristics of Epithelial Tissue Cont.
- Cells have polarity—apical (upper, free) and basal (lower, attached) surfaces
- Apical surfaces may bear microvilli (e.g., brush border of intestinal lining) or cilia (e.g., lining of trachea)
- Non-cellular basal lamina of glycoprotein and collagen lies adjacent to basal surface
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Classification of Epithelia Ask two questions
- 1.How many layers? 1 = simple epithelium
- >1 = stratified epithelium
- 2.What type of cell? Squamous Cuboidal Columnar –(If stratified, name according to apical layer of cells
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Identified and label
- Apical surface
- Basal surface
- simple
- Apical surface
- Basal surface
- Stratified
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Name and identify
- Squamous
- Cuboida
- Columnar
- simple stratified
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Identifie
- simple columnar epithelia small intestine (x160)
- simple columnar cell
- goblet cell
- microvilli
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label and identify
- pseudostratified columnar epithelium, trachea(x160)
- cilia
- pseudostratified columnar cells
- goblet cells
- lamina propria
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label and identify
- Stratified squamous Epithelia, esophagus (x40)
- muscularis mucosa
- squamous cells
- stratifield squamous epithelium
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- simple cuboidal epithelium, kidney (x160)
- simple cuboidal cell
- basement membrane
- nuclei
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- simple cuboidal epithelium, kidney
- Basement membrane
- Microvilli
- Nucleus
- Proximal convoluted tubule
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- Stratified squamous ET, vagina
- Stratified squamous epithelium
- Squamous cell
- Lamina propria
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- stratified squamous Et vagina (x80)
- Squamous cells
- Nuclei
- Stratified squamous epithelium
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- Stratified squamous epithelium, keratinized thick skin (x40)
- Stratified squamous epithelium, keratinized
- Dermal papillae
- Dermis
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- Stratified cuboidal epithelium, sweat gland in dermis(x160)
- Stratified cuboidal epithelium
- Cuboidal cell
- Duct of sweat gland
- Dense irregular connective tissue (dermis)
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- transitional epithelium urinary bladder (x160)
- Round apical cells
- Nuclei
- Basement membrane
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- transitional epithelium urinary bladder (x160)
- Round apical cell
- Transitional epithelium
- Lumen of urinary bladder
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- Simple squamous epithelium small muscular artery(x80)
- Simple squamous epithelium
- Smooth muscle
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- Simple squamous ET (x160)
- Simple squamous cell
- Nucleus
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- Simple columnar epithelial (160)
- Simple columnar epithelial cells
- Goblet cells (secreting)
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- spinal cord, motor neurons of the ventral horn(x160)
- Neuroglial cell
- Motor neurons
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- nervous tissue (x80)
- Dendrites
- Cell body
- Axon
- Nucleus
- Neuroglia
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- Stratified squamous epithelium (keratinized)thin skin 9x40)
- Stratified squamous epithelium (keratinized)
- Dermis
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- simple squamous ET, venule9x160)
- Nuclei of simple squamous cell
- Red blood cells
- Lumen of venule
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- transitional ET urinary bladder(x160)
- nuclei
- Round apical cells
- Lamina propria
- Transitional epithelium
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- Stratified squamous epithelium, keratinized, thick skin(x40)
- Stratified squamous epithelium, keratinized
- Dermis
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- pseudostratified columnar ET, trachea(160x)
- nuclei
- cilia
- Basement membrane
- Goblet cells
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- Simple cuboidal ET, kidney(160x)
- Simple cuboidal cells
- Distal convoluted tubules
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- Stratified squamous epithelium, esophagus 9x40)
- Stratified squamous epithelium
- Squamous cells
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- Simple columnar ET(160x)
- Simple columnar cell
- Nucleus
- Microvilli
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- pseudostratified columnar ET,trachea(x160)
- Cilia
- Goblet cell
- Nuclei
- Lamina propria
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- Simple squamous ET, kidney(160x)
- Simple squamous cells
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- Stratified squamous epithelium (keratinized) thin skin (x80)
- Stratified squamous epithelium (keratinized)
- Dermal papilla
- Dermis
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