Muscular tissue, Biology

Assignment Help:

MUSCULAR TISSUE

Muscular tissue in general develops from the mesoderm of the embryo but the muscles of the iris of the eye and myoepithelial cells of the salivary, mammary and sweat glands arise from the ectoderm of the embryo.

 

GENERAL STRUCTURE -

  1. This tissue constitutes the muscles, made up of cells, which are in the form of contractile fibres varying in lengths.
  2. The fibres are bound together by connective tissues but they have no intercellular substance.
  3. Myoblasts give rise to muscle fibres. Myocytes (= sarcocytes) are muscle cells.
  4. Each fibre consists of fine fibrils called myofibrils, present in the cytoplasm known as sarcoplasm.
  5. Sometimes the muscle fibre is externally covered by a membrane, termed as sarcolemma.
  6. The special property of muscular tissue is contractility & excitability.
  7. It is due to the energy stored in the electrical potential difference across the plasma membrane.

 

FUNCTIONS OF MUSCULAR TISSUE -

1.      It brings about movements of the body parts and locomotion of the individual.

2.      Muscles are responsible for peristalsis in tubular viscera, heart beat, production of sound, etc.

3.      Facial expression also depends on muscles.

4.      It supports the bones and other structures.

5.      Muscles are required for delivering a baby.


Related Discussions:- Muscular tissue

Representation of the metabolism, Biological effects: Aflatoxins are acute ...

Biological effects: Aflatoxins are acute hepatotoxins and are known to be carcinogenic in some animal species as rat. Aflatoxin B1 is acutely toxic and is responsible for liver nec

How enzyme to cut two pieces of dna, Critical Thinking Why is it necessary ...

Critical Thinking Why is it necessary to use the same restriction enzyme to cut two pieces of DNA that are to be joined together? As each restriction enzyme recognizes a specif

Blood from a donor is sterile and stored in a sealed bag, Blood from a dono...

Blood from a donor is sterile and stored in a sealed bag, but it is still kept at 4°C. What is the advantage of keeping it at this low temperature?   At 4 °C, enzyme activi

What is galactosemia, Q. What is Galactosemia? Galactosemia is a geneti...

Q. What is Galactosemia? Galactosemia is a genetic disorder caused by deficient functioning of any of these three enzymes namely galactokinase, galactose -1 - phosphate uridyl

Man-made disasters- nuclear disasters, Among all the environmental disaster...

Among all the environmental disasters that might be caused by humans, nuclear disasters have the greatest potential of causing severe damage to life property. The released as a con

How to use subcellular fractionation and a western blot, A virus capsid con...

A virus capsid containing vimentin, your protein of interest, gets into the cell nucleus and is broken down with the DNA being released. It is unknown whether the capsids themselve

Explain increases-decreases or shifts in demand terminology, Explain about ...

Explain about the increases or decreases or shifts in demand terminology. Market into equilibrium P 1 Q 1 , here demand D 1 equals supply S 1 • When price reduce fromP 1

Mechanical removal of gutta percha-endodontics principles, Mechanical remov...

Mechanical removal of Gutta percha - use k file to create channel then removed by H file Remove gutta percha by rotary ( Gates Glidden = GG ) - use suitable size and remo

Explain successive trophic levels in the pyramid of energy, What would occu...

What would occur to the successive trophic levels in the pyramid of energy if the rate of reproduction of phytoplankton was slowed down? Suggest two factors, which could cause l

What might explain the pattern, A zoologist is investigating a population o...

A zoologist is investigating a population of squirrels whose coat color is controlled by a single gene whose two alleles (B1 & B2) are codominant. B1B1 individuals are black, B1B2

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