Question

explain each of the tissues on the basis of structure and function separately​

Answer 1

Simple columnar epithelial tissues These tissues make the walls of gall bladder
and bile ducts. The cells of this tissues are closely attached to each other and look like
column. Microvilli are found on their free ends. They increase the absorptive surface
and receive stimuli from sensory organs
FREE
SURFACE

NUCLEUS

NUCLEUS
Pig, 6.18. Columnar epithelial tissues Fig. 6.19. Ciliated epithelial tissues
(2) Simple ciliated epithelial tissues These tissues are found in the inner surface
of oviduct, ureter, mucous membrane or oral cavity, tympanic cavity, brain and centre
canal of spinal cord and respiratory tract. The cells of this tissues are columnar
cuboidal; cilia the thread like structures are present on the tips of these cells.
(3) Simple squamous epithelial tissues These tissues are found in protectiv
covering around urinary tubules, body cavity (coelom) and heart
(4) Simple cuboidal epithelial tissues These tissues are found in various glands
Thyroid gland, liver, urinary tubules etc. These are cuboidal in shape.