Muscle and movements, Biology

Assignment Help:

Muscle and Movements

Earlier you have read about amoeboid movement, ciliary and flagellar movement. In this section you will learn how muscles are involved in the movement. Muscle cells are found in almost all the phyla of the animal kingdom except the phylum protozoa. Contraction and relaxation of these muscles brings about movement in the organisms. In vertebrates there are three types of muscles: skeletal muscles, cardiac muscles and smooth muscles. Skeletal muscles are attached to the bones in the arms, legs and the spinal cord and produce activities such as walking, movement of head, hands etc. Cardiac muscles are the muscles of the heart. These are specialised for continuous contractions of the heart, needed in pumping of the blood.

Smooth muscles are present in the walls of internal organs such as the large and small intestine, the gall bladder and large blood vessels. Contraction and relaxation of smooth muscles control the diameter of blood vessels and also propel food along the gastro-intestinal tract. Under the microscope the skeletal muscles and the cardiac muscles exhibit transverse light and dark bands alternating with each other. Therefore, the skeletal muscles and the cardiac muscles are also called striated muscles. The smooth muscles do not have striations.

 


Related Discussions:- Muscle and movements

Bioluminescence, #question.which annelids shws bioluminescence .

#question.which annelids shws bioluminescence .

What is aneuploidy, What is aneuploidy? What are the conditions caused by t...

What is aneuploidy? What are the conditions caused by the aneuploidies? The Aneuploidy is an abnormal number of chromosomes in the cells of an individual. The major aneuploi

What is the kind of digestive system of echinoderms, Q What is the kind of ...

Q What is the kind of digestive system of echinoderms? Echinoderms present a complete digestive system with anus and mouth. Q. Do sea urchins have teeth? Sea urchins ha

What are fat soluble vitamins, What are fat soluble vitamins? As we al...

What are fat soluble vitamins? As we already know, there are four fat-soluble vitamins - A, D, E and K, The presence of fat is required for the assimilation of these vitamins

What do you mean by post-herbal period, What do you mean by Post-Herbal Per...

What do you mean by Post-Herbal Period ? Ans. It is difficult to draw a sharp line of demarcation between the transition period, marked by various attempts of classificati

Viral diseases, Nature of viral diseases Viral diseases are manifested...

Nature of viral diseases Viral diseases are manifested in acute, sub-acute or chronic forms, as frank clinical cases or as latent infections, some of which are fatal. These di

Phototherapy unit, Phototherapy Unit Principle Photoisomerisat...

Phototherapy Unit Principle Photoisomerisation and photo-oxidation changes indirect bilirubin into water soluble substance. Operational Instruction Adjust

Explain about battery, Explain about Battery Battery:  Two electrodes ...

Explain about Battery Battery:  Two electrodes (zinc and carbon) placed in electrolyte (dilute sulfuric acid).  Chemical reactions in electrolyte force positive charges to

Cells, what are golgi apparatus

what are golgi apparatus

Explain biochemical or physiological risk factors, Explain Biochemical or P...

Explain Biochemical or Physiological Risk Factors ? The biochemical or physiological risk factors are those abnormalities, some of which are metabolic in nature, which give ris

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