EPITHELIAL TISSUE (EPITHELIUM). Epithelial tissue (Epithelium) Lining, covering and glandular tissue of the body Protection Absorption Filtration.

EPITHELIAL TISSUE (EPITHELIUM)

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

the body

Protection Absorption Filtration Secretion

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)

Epithelial tissue (Epithelium)

Simple Squamous

Single layer of thin squamous cells

Forms membranes for filtration/exchange

Air sacs of lungs Walls of

capillaries

Simple Squamous

Simple Cuboidal

Single layer of cuboidal cells

Glands/Ducts Salivary Glands Ducts in Pancreas

Kidney tubules Surface of

ovaries

Simple Cuboidal

Simple Columnar

Single layer of columnar (tall) cells

Line digestive tract

Goblet cells: produce mucus

Simple Columnar

Pseudostratified (ciliated) columnar

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

Stratified squamous

Several layers of cells

At the top squamous and close to basement membrane (bottom) are cuboidal or columnar

Can stand friction: Esophagus Mouth skin

Stratified squamous

Transitional (stratified)

Cells at base are cuboidal or columnar, free surface varies

Tissue can stretch

Lines the: Urinary bladder Ureters Part of urethra

Transitional (stratified)

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

Connective Tissue - Presentation Research your assigned connective

tissue

Description and properties of the tissue Structure and functions Where in the body is this tissue found?

(examples)

You can write/draw on a blank slide on the board

Presentation should be at least 2-5min