Page 3 - 2- Lesson Notes- Animal Tissue- Epithelial

 The cells are extremely thin and flat and
form a delicate lining.

 The lining of oesophagus and the mouth are covered with squamous
epithelium.

STRATIFIED SQUAMOUS EPITHELIUM

 The cells are arranged in many layers to

prevent wear and tear.

 Since they are arranged in a pattern of
layers, the epithelium is called stratified

squamous

 The skin, which protects the body, is
made of squamous epithelium.

SIMPLE COLUMNAR EPITHELIUM

 The columnar (meaning ‘pillar-like’) epithelium facilitates movement across

the epithelial barrier.

 It is present where absorption and
secretion occur, as in the inner lining of

the intestine, tall epithelial cells are
present.

 In the respiratory tract, the columnar

epithelial tissue also has cilia, which are
hair-like projections on the outer

surfaces of epithelial cells.

 These cilia can move, and their movement pushes the mucus forward to clear
it. This type of epithelium is thus ciliated columnar epithelium.

SIMPLE CUBOIDAL EPITHELIUM

 Cuboidal epithelium (with cube-shaped

cells) forms the lining of kidney tubules