Skin (Integument) Figure 5.3 Epidermis Layers of the Epidermis: STRATA = LAYERS Epidermis CGSBDCGSBD...
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Transcript of Skin (Integument) Figure 5.3 Epidermis Layers of the Epidermis: STRATA = LAYERS Epidermis CGSBDCGSBD...
Tissues
• Groups of cells similar in structure and function
• The four types of tissues–Epithelial
–Connective
–Muscle
–Nerve
Epithelial Tissue
–covers the body surfaces
–lines the lumen of organs
–lines the body cavities
–forms glands and lines ducts
Epithelial Tissue - characteristics• Cellularity –• Special contacts – tight / desmosomes• Polarity – apical / basal• Supported by connective tissue – lamina• Avascular but innervated – • Regenerative –
(bar = 1um)
Lumen of alveolusSimple squamous of alveolusSimple squamous of capillary
Lumen of alveolus
Respiratory membrane
Gall BladderSimple columnar epithelium lines the gall bladder. Note the underlying connective tissue with blood vessels.
Bar = 100 Microns
Gall BladderSimple columnar epithelium lines the gall bladder. Note the underlying connective tissue with blood vessels.
Bar = 100 Microns.
Trachea The pseudostratified columnar epithelium of the trachea is ciliated and has goblet cells.
Bar = 50 um
Pseudostratified columnar epithelium Pseudostratified columnar epithelium with cilia and goblet cellswith cilia and goblet cells