EPITHELIAL TISSUE (EPITHELIUM). Epithelial tissue (Epithelium) Lining, covering and glandular...

EPITHELIAL TISSUE (EPITHELIUM)

Epithelial tissue (Epithelium) Lining, covering and glandular tissue of

the body

Epithelial tissue (Epithelium) Examples:

Skin protects against bacteria/chemicals Lining of the respiratory tract-cilia to sweep

mucus Kidney-epithelium absorbs and filters Secretion-glands

Epithelial tissue (Epithelium)

Forms membranes for filtration/exchange

Glands/Ducts Salivary Glands Ducts in

Pancreas

Kidney tubules Surface of

ovaries

Line digestive tract

Goblet cells: produce mucus

Some cells are shorter than others

Absorption and secretion

Ciliated variety lines the respiratory tract

Goblet cells make mucus

Cilia move mucus

Pseudostratified (ciliated) columnar

Several layers of cells

Can stand friction: Esophagus Mouth skin

Cells at base are cuboidal or columnar, free surface varies

Tissue can stretch

Lines the: Urinary bladder Ureters Part of urethra

Extracellular matrix Produced by connective tissue cells Secreted to exterior

Ground substance, proteins and large polysaccharides

Matrix fibers

Gel like, to firm, to rock hard

Extracellular matrix

Extracellular matrix

Types of Connective Tissue Bone Cartilage Dense Connective Tissue Loose Connective Tissue Blood