Integumentary system - glands, Biology

Assignment Help:

Glands -

1.      SEBACEOUS GLAND -

  1. Absent in palm and sole. Holocrine in nature.
  2. Branched, alveoli are present, sac like in appearance.
  3. Generally attached to follicle but in free form on lips, prepuce labia majoris and labia minoris.
  4. It's secretion is sebum, makes hair shinny & water proof.
  5. In sebum 7-Dehydroxy cholesterol present that react with sun rays to form Vit. D (calciferol).

 

2.      SWEAT GLAND OR SUDDORFFIC GLAND OR SERUS GLAND -

  1. It is long tube like, coiled, embeded in dermis, opens out side by pore.
  2. Each gland consists of secretory part & a duct.
  3. Secretory part is greatly coiled & surrounded by myoepithelial cells assists in expelling the sweat.
  4. It's secretion is sweat, it consists of 95% H O, 2% minerals & CO, 3% urea.
  5. Sweat is meant for temperature regulation or thermoregulation or homeostatis, under control of thyroxine & sympathetic nervous system.
  6. Nature is apocrine i.e. with secretion some cytoplasm come out.
  7. In sweat, saliva, tear, lysozyme present to kill bacteria.
  8. When body temperature rises the sweat glands release bradykinin which dilates b.v. to loss heat quickly.

Related Discussions:- Integumentary system - glands

Describe the phylogenetic system of classification, Q. Describe the phyloge...

Q. Describe the phylogenetic system of classification? 1) Hutchinson believed in Monophyletic origin of Angiosperms from a hypothetical group, which he' named, as Proangiosperm

Reproduction in human beings, Are sperms being attacked by the body since t...

Are sperms being attacked by the body since they are foreign?

Protozoa, what are characteristics of protozoa?

what are characteristics of protozoa?

Which are nucleotides portions, Q. Which are nucleotides "portions" that to...

Q. Which are nucleotides "portions" that to bind in the formation of nucleic acids? What is meant by the 5' and 3' extremities of the nucleic acids? The phosphate group of one

List the four basic points of food exchange, List the four basic points to ...

List the four basic points to be kept in mind when advising food exchange. To develop the food exchange list points to keep in mind are: a) Group similar foods in one group.

What is implant prior to stage 2 surgery, Enumerate the different means of ...

Enumerate the different means of evaluating the implant prior to stage 2 surgery. The Different means for evaluating the implant prior to stage 2; i) Radiographic evaluation

The protective structures of the central nervous system, What are the prote...

What are the protective structures of the central nervous system present in vertebrates? In vertebrates the brain and the spinal cord are protected by membranes, the meninges,

Assessment of exstrophy of the bladder, Assessment You can observe it...

Assessment You can observe it visually at birth. The anterior abdominal wall is absent and the posterior bladder lining which is bright red in colour is exposed. Urine seeps

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd