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From Karnataka Open Educational Resources
Organisation of cells animal tissues (view source)
Revision as of 17:04, 4 August 2014
, 17:04, 4 August 2014→Notes for teachers
===Notes for teachers===
===Notes for teachers===
Muscular tissue consists of elongated cells, also called muscle fibres.Muscles contain special proteins called contractile proteins, which contract and relax to cause movement.This property is responsible for movement of limbs and bending of body.The movement of internal organs like heart, stomach and alimentary canal are also caused by muscles.<br>
Muscles are of three types, based on structure,function and location.They are;<br>
#Striped muscles
#Unstriped muscles
#Cardiac muscles<br>
'''Striped muscles'''<br>
Muscles present in our limbs can be moved or stopped by our conscious will. Such muscles are called voluntary muscles. These muscles are also called
skeletal muscles as they are mostly attached to bones and help in body movement. Under the microscope, these muscles show alternatelight and dark bands or striations when stained appropriately. As a result, they are also called striated muscles. The cells of this tissue are long, cylindrical, unbranched and
multinucleate.These muscles fatigue easily.
'''Unstriped muscles'''<br>
Unstriped muscles are made up of spindle shaped, elongated muscle fibres without striations. They are called smooth muscles.The movement of food in the alimentary canal or the contraction and relaxation of blood vessels are involuntary movements. We cannot control these movements on our own will. Smooth muscles or involuntary muscles control such movements. They are also found in the iris of the eye, in ureters and in the bronchi of the lungs.<br>
'''Cardiac muscles'''<br>
The muscles of the heart show rhythmic contraction and relaxation throughout life. These involuntary muscles are called cardiac muscles. Heart muscle cells are cylindrical,elongated, branched and uninucleate. They do not fatigue easily.
===Activities===
===Activities===
#Activity No #1 '''page_name_concept_name_activity1'''
#Activity No #1 '''page_name_concept_name_activity1'''
