In metazoa,which of the following is responsible for the locomotion and movement of organs?

The ensheathing of muscles is called:

Describe the structure of cardiac muscle tissue.

Which of the following types of muscle tissue is being described on the basis of the given statements?
$(i)$ These muscle fibres taper at both ends and do not show striations.
$(ii)$ The wall of internal organs such as the blood vessels,stomach,and intestine contain this type of muscle tissue.
$(iii)$ They are 'involuntary' as their function cannot be directly controlled.

Which of the following is an example of multiunit smooth muscles?

Identify the location and function of the following structures:
$(i)$ Intercalated discs
$(ii)$ Haemoglobin