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10 Cards in this Set
- Front
- Back
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Define tissue.
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groups of cells with similar structure and function
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What are the four principal human tissue types?
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epithelium (covering)
connective (support) muscle (movement) nervous (control) |
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Fertilization produces a ______ that undergoes repeated ____ _________ form a __________ that contains three primary germ cell layers.
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zygote; cell divisions; blatocycst
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Each germ layer participates in the formation of one or more tissue types. What are they?
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Ectoderm (neural tissue)
Mesoderm (connective & muscular) Endoderm (epithelium). |
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What are the two types of epithelial tissue?
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1. Covering and lining
2. Glandular |
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What are the functions of epithelial tissue?
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Protection, absorption, filtration, excretion, secretion
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What are the characteristics of epithelial tissue?
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1. Cellularity - composed entirely of cells
2. Specialized contacts - fit close together to form continuous sheets of cells 3. Polarity - epithelium always has one free surface (apical) and one bound surface (basal) 4. Avascularity - no blood vessels associated with epithelium, nutrients diffuse into cells 5. Basement membrane - basal surface of epithelium rests on thin supporting basal lamina (glycoproteins); connective tissue under basal lamina secrete collagenous fibers that make a layer called reticular lamina (basal + reticular lamina - basement membrane) 6. Regeneration - epithelium undergo mitosis |
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Epithelia are classified according to their ____ and ________.
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shape; arrangement
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The shape of epithelia are classified as...
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squamal cuboidal, columnar, pseudostratified
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The arrangement of epithelia are classified as ...
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simple of stratified
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