Biology Questions and Answers
Epithelia
- What is the function of the
skin in humans?
The skin is the external covering of the
body. In humans itsprotection, perception main functions arof information e
from the environment, control of the
body temperature and secretiosubstances. n of
- What are the tissues that
form the skin in vertebrates?
The skin of epidermis, an vertebrates is madexternal layer of epitheliale of (^)
tissue, atissue under the epidermis. Ond dermis, a layer of connectivene can cite (^)
also the hypodermis, a layer of adipose
tissue under the dermis.
Skin annexes may exist in some phyla
and classes,sebaceous glands. like hair, sweat glands and
- Besides the skin what are
the other coverings of the
body?
Besides the skin thecovering tissues made of epitheliumre are other (^)
over other tissue layers. Thtissues that cover the internal surfacesey are the (^)
of hollow organs, like the organs of the
digestive tube, the tubules, the ureters, the bladder, theairway, the renal (^)
urethra and the blood vessels. The
glands amade of epithelial tissue too.nd the serous membranes are
- What are some functions of
the epithelium?
The epithelial tissuescovering, impermeability and protection can perform (^)
against the environment, for example,in the skin, resorption, as in the guts
and renal tubules, gas exchange, for
example, regulation, like swthe amphibian skin, teating, secretion ohermalf
substances, as in the epithelium of
glands. Ihas the important fn some animalsunction o the skin f also
camouflage and mimicry.
- What is the typical feature
of the epithelia? How different
is it from the connective
tissue?
The typicalthe absence feature of the epithelium or almost absence of spaceis (^)
between cells. The epithelial cells arecompactly positioned side-by-side with (^)
the help of specialized structures for cell
adhesion like dinterdigitations.esmosom This feature relates toes and (^)
the fact that thexposed to an exterior sese tissues are urround and sogenerally
they need more resistance and
impermeabilitystrange material i against the entrance ofnto the body.
The connective tissue prfeatures due to its filling function. Iesents oppositet has (^)
much interstitial material (the matrix)
and relatively large space between cells.
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