Types of muscle fibres


Points of difference   Unstriped muscles    Striped muscles    Cardiac muscles
1.      location In the walls of hollow internal organs, like stomach, intestine, etc Attached to the skeleton In the walls of heart.
2.      shape Elongated, spindle- shaped, tapering at both ends. Long, cylindrical, non tapering, unbranched Elongated, cylindrical and branched.
3.      arrangement Arranged in tubes. In bundles Forming a network
4.      sarcolemma True sarcolemma not found present present
5.      nucleus Uninucleate, and central nucleus Multinucleate, and peripheral nucleus Many nuclei between successive end plates
6.      cytoplasmic contents Less mitochondria and glycogen granules Numerous mitochondria and glycogen granules Numerous and large mitochondria and glycogen granules faintly present
7.      striations absent present Faintly present
8.      blood supply poor rich rich
9.      myofibrils Smaller and indistinct Larger and much greater in number Myofibrils are visible
10.  nerve supply From autonomous nervous system Have both motor and sensory nerve endings from central nervous system From autonomous nervous system
11.  mode of working involuntary voluntary Myogenic
12.  contractions Slow and rhythmic with long resting period Rapid with short resting period Continuous and rhythmically
13.  tiredness Do not get tired easily Becomes tired easily Do not get tired
      14. energy demand Much less and constantly High and at a time High and constantly

Cardiac, Smooth, and Skeletal Muscle

                                                                                                   Image source: brainkart


i) https://www.zigya.com/study/book?class=11&board=hpbose&subject=Biology&book=Biology&chapter=Locomotion%20and%20Movement&q_type=&q_topic=Skeletal%20System&question_id=BIEN11007846

ii) https://www.toppr.com/ask/en-np/question/short-long-answer-type-questionslist-the-differences-between-a-striated-smooth-and-cardiac-muscle-fibre/

Types of muscle fibres