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33 Cards in this Set
- Front
- Back
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What is tissue?
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A group of cells that have a specialized structure and function.
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Name the 4 types of tissue.
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Epithelial (covers surface)
Connective (holds stuff together) Muscle Nervous |
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Describe epithelial tissue and what it does.
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1) Covers body surfaces and internal organs, composes glands
2) Functions (protection, secretion, absorption, filtration) 3) Lacks blood vessels (avascular) 4) Divides easily (highly mitotic) 5) Tightly packed (cells are close together held by desmosones) |
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What is a basement membrane?
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A layer that anchors epithelial tissue to underlying connective tissue.
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What is a goblet cell?
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A cell that secretes protective fluid (mucus) onto the free surface of the tissue.
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What is a lumen?
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A space within a tubular structure.
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Name the 8 types of epithelial cells.
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Simple Squamous
Simple Cuboidal Simple Columnar Pseudostratified Ciliated Columnar Stratified Squamous Stratified Cuboidal Stratified Columnar Transitional |
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Functions of Simple Squamous
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Filtration
Diffusion/osmosis Covers surfaces |
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Locations of Simple Squamous
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Air sacks of lungs
Walls of capillaries Linings of lymphatic vessels |
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Functions of Simple Cuboidal
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Secretion
Absorption (always see lumen) |
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Locations of Simple Cuboidal
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Ovaries
Kidney tubules Ducts of glands |
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Functions of Simple Columnar
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Absorption (nutrients)
Secretion (mucus) Protection (nuclei at bottom to get oxygen and energy from blood cells) |
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Locations of Simple Columnar
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Lining of uterus, stomach, intestines
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Functions of Pseudostratified Ciliated Columnar
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Secretion (mucus)
Protection Movement of Mucus (has cilia, nuclei at different levels, maybe more than one nuclues) |
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Locations of Pseudostratified Ciliated Columnar
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Linings of respiratory passages
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Functions of Stratified Squamous
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Protection
(50-100 cell layers) |
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Locations of Stratified Squamous
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Outer layer of skin
Lining of mouth, throat, vagina, anal canal |
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Functions of Stratified Cuboidal
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Secretion
(2-3 layers) |
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Locations of Stratified Cuboidal
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Pancreas
Glands: mammary, sweat, saliva |
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Locations of Stratified Columnar
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Secretion
Protection (2-3 layers) |
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Locations of Stratified Columnar
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Part of throat
Part of male urethra Vas deferens |
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Functions of Transitional
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Distensibility (changes in response to increased tension)
Protection (prevents diffusion back into body) |
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Locations of Transitional
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Bladder
Urethra Ureters |
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What's the significance of "Squamous"
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Flattened Cells, "Squished grapes," irregular edges
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What's the significance of "Cuboidal"
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Cube-shaped cells, tall as they aer wide.
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What's the significance of "Columnar"?
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Tall cells, column shaped
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What's the significance of "Simple"?
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One cell layer atop basement membrane
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What's the significance of "Stratified"?
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Multiple cell layers on top of basement membrane
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What's the significance of "Pseudostratified"?
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One cell layer, but looks like many.
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What are the 3 types of glands?
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Merocrine
Apocrine Holocrine |
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Function, examples, and types of tissue of Merocrine
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Secrete very thin fluid, fluid released through cell membrane via exocytos.
Salivary, sweat, pancreatic glands Simple or stratified cuboidal |
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Function, examples, and types of tissue of Apocrine
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Thicker fluid, cellular product and part of cell pinch off during secretion
Mammary glands Stratified cuboidal |
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Function, examples, and types of tissue of Holocrine
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Whole cell fills with secretion, bursts (disintegrates) really thick.
Sebaceous (oil) and Ceruminous (ear wax) Stratified cuboidal |
