Pancreas and its structure, Biology

Assignment Help:

PANCREAS -

It is derived from the endoderm of the embryo.

Structure. The pancreas lies inferior to the stomach in a bend of the duodenum.

  • It is both an exocrine and an endocrine gland i.e. heterocrine gland.
  • A large pancreatic duct runs through the gland, carrying enzymes and other exocrine digestive secretions from the pancreatic acinar cells to the small intestine. The tissue of the pancreas has in addition to the acinar cells, groups of cells called islets of Langerhans, after the name of their discoverer (1869), which produce endocrine secretions.
  • Four kinds of cells have been identified in the islets.

(i) Alpha cells (about 20%) produce glucagon. Alpha cells are also called A-cells. (ii) Beta cells (about 70%) produce insulin. Beta cells are also called B-cells.

(iii) Delta cells or D-cells (about 5%) produce somatostatin (SS). (iv) PP cells or F-cells (5%), produce pancreatic polypeptide (PP).

  • Beta cells are usually found towards the middle of the islet, the alpha cells towards the periphery of the islet and Delta (D) and F-cells are found scattered.

720_pancreas.png


Related Discussions:- Pancreas and its structure

What is chromosomes, What is Chromosomes ? The terminology used to desc...

What is Chromosomes ? The terminology used to describe DNA replication may sometimes be confusing. Originally, the term "chromosome" referred to the structures seen through the

Define some caution for inoculating loops and needles, Define Some Caution ...

Define Some Caution for Inoculating Loops and Needles? 1. Heat the inoculating wire till it becomes red hot. 2. Never use hot inoculating wire for culturing otherwise cells

Illustrating how neuropsychologists evaluate young children, Illustrating h...

Illustrating how neuropsychologists evaluate young preschool children, older children, youngster adults, and elderly adults. The brain is an evolving organ and functions very

Inverse pcr, Inverse PCR is the variation of PCR which makes the amplifica...

Inverse PCR is the variation of PCR which makes the amplification of DNA segments of unknown sequence that flank DNA segments of the known sequence possible; in short, total DNA i

Synthetic petrol, Petrol or gasoline can be synthesized by following three ...

Petrol or gasoline can be synthesized by following three methods: 1.      Polymerisation 2.      Fischer - tropsch method 3.      Bergius process polymerisation In

Lamellar models, LAMELLA R MODELS According to James Danielly & Hu...

LAMELLA R MODELS According to James Danielly & Hugh Davson (1935) cell membrane consists of 4 layers P-L-L-P. Molecules of phospholipid has amphipathic nature, i.e. it

Define factorial method to calculate nitrogen requirements, Define Factoria...

Define Factorial method to Calculate Nitrogen Requirements? The nitrogen requirements have been calculated by a factorial method suggested by different expert groups, described

What is the implant site evaluation, Implant site evaluation 1. Ridge:...

Implant site evaluation 1. Ridge: Total buccolingual width of the ridge- the thickness of the soft tissue ( bucally +lingually)= Buccolingual width of the bone. There shou

Management of gout, Q. Management of Gout? The goals of therapy or mana...

Q. Management of Gout? The goals of therapy or management of gout is based on the following aspects: • early resolution of inflammation, • prevention of recurrent attac

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