COMPARATIVE AMONG CELLS

Ciliated columnar cell	Mucous goblet cell	Brush cell
Most abundant Has 300 motile cilia Apical cytoplasma has basal body ( mitochondria- energy for cliary neating)	Next numerous cell Secret mucous -covers epithelium -traps bacteria n ather particles	Columnar cell Abundant microvilli Basal afferent nerve endings Be sensory receptor
Basal cell	Neuroendocrine cell (small granule cell )
Small rounded cell Don’t reach the lumen Lie on basal lamina May be stem cell	Scattered through out epithelium Have numerous granules With different dense cores Release different hormone like calcitonin, somatostin and serotonin Belong to the cell of diffuse endocrine system

COMPARATIVE AMONG CELLS

Epitehelial cell type ( Respiratory epithelium )

Olfactory area ( Olfactory epithelium )

Olfactory or sensory cell	Sustentacular ( supporting ) cell
Bipolar nerve cell Nuclei occupy below supporting cell Dendrit extend to the surface - end in olfactory vesicle - olfactory 6-8 cilia arise cilia – very long - non motile - project into a layer of fluid covering epithelium axon – pass to the corium ( form olfactory nerve fiber )	Tall columnar cell - narrow basses - wide cylindrical apex nuclei – oval - lie near free surface of epithelium cytoplasma - contain yellow pigment - gives olfactory mucosa its yellow colour free surface with microvilli submerge in a fluid of layer
Basal cell
Small pyramidal Present in deepest zone of epithelium Stem cells	Round dark nuclei Deeply basophilic cytoplasm

THE TOUNGE PAPILLAE

Features	FILIFORM	FUNGIFORM
shape	Elongated conical	Resemble mushroom - narrow stalk - smooth surface - dilated upper part
Number	Most numerous
Site	Anterior 2/3 of the dorsum of the tounge
Epithelium	Keratinized stratified squamous	Thin non-keratinized stratified squamous epithelium
Taste bud	none	Scattered
Colour	whitish	Red ( richly vascularized CT core )

Features	CIRCUMVALLETE	FOLIATE
Shape	Largerst
Number	Least ( 6-14 )
Site	In V-shape region in front of sulcus terminalis	Poor develop in human. Well-develop in animal like rabbit etc
Epithelium	non-keratinized stratified squamous epithelium	non-keratinized stratified squamous epithelium
Taste bud	Present on the side of papillae	Many
glands	Serous gland ( von Ebner’s )	Serous gland in lamina propria
Others	Surrounded by circular furrow or sulcus	Consisit of 2 @ more parallel ridges and furrow on dorsolateral surface of tounge