Integumentary system - glands, Biology

Assignment Help:

Glands -

1. SEBACEOUS GLAND -

Absent in palm and sole. Holocrine in nature.
Branched, alveoli are present, sac like in appearance.
Generally attached to follicle but in free form on lips, prepuce labia majoris and labia minoris.
It's secretion is sebum, makes hair shinny & water proof.
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 -

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

Related Discussions:- Integumentary system - glands

Define nitrogen requirements in pregnancy and lactation, Define Nitrogen re...

Define Nitrogen requirements in Pregnancy and Lactation? The nitrogen accretion in the pregnant woman (assuming that the foetus weighs 3.3 kg at term), estimated by the Committ

Mechanism of phloem transport, Mechanism of Phloem Transport The effic...

Mechanism of Phloem Transport The efficiency and magnitude of translocation of food material are evident from the annual yields of various crops and fruits. Now, the question

Clinical features of aortic stenosis, Q. Clinical Features of aortic stenos...

Q. Clinical Features of aortic stenosis? Patients with congenital aortic stenosis usually present in childhood or adolescence. Those with rheumatic heart disease present durin

Is fecundation in amphibians external or internal, Is fecundation in amphib...

Is fecundation in amphibians external or internal? In this aspect are amphibians evolutionarily proximal to fishes or to reptiles? In the majority of the amphibian species fec

How does the body defend itself from microorganisms, Q. How does the body d...

Q. How does the body defend itself from microorganisms and other harmful substances that enter the airway during the breathing process? The epithelium of the airway is a ciliat

Describe cultural characteristics of microorganisms, Q. Describe Cultural C...

Q. Describe Cultural Characteristics of Microorganisms? Bacterial growth in and on foods often is extensive enough to make the food unattractive in appearance or otherwise obj

Cortex, Cortex can be described as follows 1) The outer part of the org...

Cortex can be described as follows 1) The outer part of the organ, such as, the adrenal cortex, which produces many steroidhormones; 2) in plants, the area of the stem or root

Human lungs, Human lungs A pair of spongy, elastic and bag like stru...

Human lungs A pair of spongy, elastic and bag like structures of lungs is present in the chest cavity, one on either side of the heart. Lungs are enclosed by a double lay

In which environments do bacteria live, In which environments do bacteria l...

In which environments do bacteria live? Bacteria can be found in various environments throughout the planet. There are bacteria in the air, in fresh water, on the surface, in t

What is fehling's test - reduction tests, What is Fehling's test - Reductio...

What is Fehling's test - Reduction Tests? This test is answered by all reducing sugars which possess a free aldehyde or ketone group. All monosaccharides possess a free aldehyd

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages