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Skin (Integument). Figure 5.3. Epidermis. Layers of the Epidermis: STRATA = LAYERS. C G S B D. C G S B D. Epidermis. Tissues. Groups of cells similar in structure and function The four types of tissues Epithelial Connective Muscle Nerve. EPITHELIAL TISSUE.

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skin integument
Skin (Integument)

Figure 5.3

Epidermis

tissues
Tissues
  • Groups of cells similar in structure and function
  • The four types of tissues
    • Epithelial
    • Connective
    • Muscle
    • Nerve
epithelial tissue
Epithelial Tissue
  • covers the body surfaces
  • lines the lumen of organs
  • lines the body cavities
  • forms glands and lines ducts
epithelial tissue characteristics
Epithelial Tissue - characteristics
  • Cellularity –
  • Special contacts – tight / desmosomes
  • Polarity – apical / basal
  • Supported by connective tissue – lamina
  • Avascular but innervated –
  • Regenerative –
classification of epithelia
Classification of Epithelia
  • Simple or stratified

Figure 4.1a

slide12

apical

basal

classification of epithelia1
Classification of Epithelia
  • Squamous, cuboidal, or columnar
  • DESCRIPTION

Figure 4.1b

simple squamous
Simple Squamous

DESCRIPTION

FUNCTIONS

PRESENCE- glomeruli, alveoli, etc.

Figure 4.2a

slide19

C

AL

Squamous

Type II cell

slide20

Lumen of alveolus

Simple squamous of alveolus

Simple squamous of capillary

Respiratory membrane

Lumen of alveolus

(bar = 1um)

epithelia simple cuboidal
Epithelia: Simple Cuboidal
  • DESCRIPTION
  • FUNCTIONS
  • PRESENCE-

Figure 4.2b

slide33

RESORB

FILTER

SECRETE

2,000L

180L

EXCRETE

1.5L

epithelia simple columnar
Epithelia: Simple Columnar

DESCRIPTION

FUNCTIONS

PRESENCE

Figure 4.2c

slide35
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.

slide42

DESCRIPTION

FUNCTIONS

PRESENCE

Figure 4.2d

slide43
Trachea The pseudostratified columnar epithelium of the trachea is ciliated and has goblet cells.

Bar = 50 um