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

Why is blood significant for larger animals, What is the alternative means ...

What is the alternative means for transport of substances in animals without a circulatory system? Why is blood significant for larger animals? In animals that do not present t

Define termination phase - mechanism of protein synthesis, Define Terminati...

Define Termination phase - mechanism of protein synthesis? Termination: RNA polymerase recognizes the terminator, which results in no further nucleotides being incorporated and

What is saliva, What is Saliva Saliva   is  the colourless  viscous  f...

What is Saliva Saliva   is  the colourless  viscous  fluid.  It  helps  in  swallowing the  food  by lubricating the food and the neutral pH of saliva prevents the decalcifica

What is esophagus called, What is the valve that separates the stomach from...

What is the valve that separates the stomach from the esophagus called? What is its function? The valve that separates the stomach from the esophagus is the cardia. It has the

Define water losses by intestine and lungs, Define water losses by Intestin...

Define water losses by Intestine and Lungs? Intestine : A small quantity of water (about 100-200 ml) is normally lost in faeces, but this can exceed 5 L in diarrhoeal episodes

How many atp molecules are made after glycolysis, How many ATP molecules ar...

How many ATP molecules are made after glycolysis? Glycolysis is a process same to glucose degradation in fermentation. It forms (final balance) two molecules of ATP for each br

Show species with exoskeleton, Q. Which other phylum of the animal kingdom ...

Q. Which other phylum of the animal kingdom present species with exoskeleton? Arthropods present exoskeleton made of chitin. Echinoderms do not have exoskeleton but they presen

Explain about spring model, Q. Explain about Spring Model ? The spring ...

Q. Explain about Spring Model ? The spring model depicts elasticity. A force is applied in terms of load onto the spring as illustrated in the figure 8.6. When the force is app

RESPIRATION, I HAVE TO MAKE A ASSIGNMENT ON RESPIRATION

I HAVE TO MAKE A ASSIGNMENT ON RESPIRATION

Explain the sensory receptors, Sensory Receptors Sensory information re...

Sensory Receptors Sensory information received by these receptors is transmitted through sensory fibres of peripheral nerves to sensory areas at different levels of spinal cord

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