Muscular tissue, Biology

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.

Posted Date: 10/1/2012 3:42:17 AM | Location : United States







Related Discussions:- Muscular tissue, Assignment Help, Ask Question on Muscular tissue, Get Answer, Expert's Help, Muscular tissue Discussions

Write discussion on Muscular tissue
Your posts are moderated
Related Questions
What is the difference between alpha glucose and beta glucose? Why are they different?

What is the main moral problem about the cloning of human individuals? Besides biological perils, a very serious moral problem includes the nucleus transplantation technology c

What is NADP and NADPH? NADP is the abbreviation of the nicotinamide adenine dinucleotide phosphate cation, a hydrogen acceptor. NADPH is made when NADP binds to one hydrogen a

Fluoxetine is an antidepressant drug that presents an action mechanism related to the synaptic transmission. What is that mechanism? Fluoxetine is a substance that inhibits th

Q. How are the excretory systems of the three major arthropod classes constituted? In crustaceans a pair of excretory organs called green glands exists, the green glands collec

Q. Which organs of the body is part of the human digestive system? The digestive system also known as "systema digestorium" or gastrointestinal system is composed of the digest

Glanders The disease, also known as equine nasal phithisis, farcy or malleus, is highly infectious anthropozoonosis and is caused by Burkholderia (earlier Pseudomonas) mallei.

what is granna

Explain the Mendel's Laws in genetics? Based on the results of his experiments, Mendel proposed three laws regarding the inheritance of traits: the Law of Segregation, the Law

a) Describe with the help of a suitable example for each of the following terms : (i) morphallaxis (ii) epimorphosis and (iii) compensatory regeneration.