Adrenal gland, Biology

ADRENAL OR SUPRARENAL GLANDS (GLANDS OF EMERGENCY) -

  • These are paired structures located on the top of the kidneys.
  • Each adrenal gland has two parts external adrenal cortex and internal adrenal medulla.
  • The adrenal cortex is derived from the mesoderm of the embryo & adrenal medulla from the ectoderm.
  • The cortex is surrounded by a fibrous capsule.
  • The adrenal cortex is differentiated into three regions or zones -

             (i) Outer, thin zona glomerulosa (15% of the gland)

             (ii) Middle, thick zona fasciculata (50% of the gland)

             (iii) Inner, thin zona reticularis (7% of the gland).

  • The cells of the zona fasciculata and zona reticularis contain vitamin C (ascorbic acid).

655_adrenal gland.png

Posted Date: 10/2/2012 6:54:05 AM | Location : United States







Related Discussions:- Adrenal gland, Assignment Help, Ask Question on Adrenal gland, Get Answer, Expert's Help, Adrenal gland Discussions

Write discussion on Adrenal gland
Your posts are moderated
Related Questions
Define Supplementation for prevention of vitamin A deficiency? Administration of large doses of vitamin A to children at risk has been the most popular approach to control nutr

What are sarcomeres? Sarcomeres are the contractile units of the muscle tissue formed of alternating actin blocks (thin filaments) and myosin blocks (thick filaments). Various

Coarse fish reach or lowland course zone This zone corresponds to the lower course of the river. Here the river is deep and slow moving. Its sluggish flow results in the depos

What proportion of children with Down syndrome do you expect when women with down syndrome have children with men who have 46 chromosomes Justify your answer

Define Precautions for Check the Presence of Rhodamine B? 1. Sample should be clean and dry. 2. Dispose off the paraffin oil carefully, so that it does not contaminate food/

why are they called as pisces

similarity between pisces & mammals about dirhynous condition......

CIRCUL A T O R Y SYSTEM IN COCKROACH Type is open or lacunar. i.e. b.v. absent. Organs are dipped in haemolymph. 1 .      HAEMOLYMPH - Blood and lymph are mixed.

What is the Food Processing? Food processing, as you learnt earlier, involves the conversion of raw materials and ingredients into an acceptable food product for the consumer.

Define Carcinogenic - Non-dietary Factors? A large number of agents cause genetic damage and induce neoplastic transformation of cells, they fall into the following categories.