NCERT Class 9 Science Solutions: Chapter 6 – Tissues Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 6

Q. Diagrammatically show the difference between the three types of muscle fibres.


Q_6_ (I) _Image_Showing_Striated_Muscle_Fibre
Q_6_ (II) _Image_Showing_Smooth_Muscle_Fibre
Q_6_ (III) _Image_Showing_Cardiac_Muscle_Fibre

Question 7

Q. What is the specific function of cardiac muscle?


Cardiac muscles are involuntary muscles which show characteristics of both smooth and striated muscles. These muscles occur in the walls of the heart.

Functions of Cardiac Muscles

  • Cardiac muscles contract and relax rapidly, rhythmically and tirelessly throughout life. They contract endlessly from early embryonic stage until death.
  • The contraction and relaxation of heart muscles help to pump and distribute blood to various parts of body.
  • The cardiac muscle is to control the contraction and relaxation of the heart is the specific function of cardiac muscle.

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