histology: the study of tissues...i. epithelial tissues •functions: protection, absorption,...
TRANSCRIPT
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Histology: The Studyof Tissues
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Four Categories of Tissues
• Epithelial Tissue
• Connective Tissue
• Muscle Tissue
• Nervous Tissue
Know functions
at this level
ONLY!
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I. Epithelial Tissues
• Functions: protection, absorption, secretion, excretion
• Features: lack blood vessels, tightly packed, free edge
• Classified by shape and number of layers (for the most part!)
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Simple Squamous Epithelium
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Simple Cuboidal Epithelium
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Simple Columnar Epithelium
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Pseudostratified Columnar Epithelium
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Stratified Squamous Epithelium
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Stratified Columnar Epithelium
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Stratified Cuboidal Epithelium
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Transitional Epithelium
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Glandular Epithelia
• Classified based on:
• How secretions move through the body:
• Exocrine vs. Endocrine glands
• How secretions are released from the gland:
• Apocrine, Merocrine, Holocrine secretion
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II. Connective TissuesCells are widely spaced with extracellular material (matrix) between the cells
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Loose Fibrous Connective Tissue (Areolar)
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Dense Fibrous Connective Tissue
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Adipose Tissue
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Cartilage
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Cartilage
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Bone (Osseous Tissue)
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Blood
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III. Muscle Tissue
• Muscle tissue is conductive
• Muscle tissue is contractile (unique to this tissue)
• Three types:
• Skeletal
• Cardiac
• Smooth
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Nervous tissue
• Nervous tissue is conductive
• Composed of:
1. neurons which generate and conduct impulses
2. neuroglial cells provide anatomical and functional support to the neurons
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