The rumen in a camel functions as:

$Ca^{2+}$ is required in which of the following processes?

Match Column $I$ with Column $II$.

Column $I$	Column $II$
$(a)$ Smooth muscle	$(i)$ Myoglobin
$(b)$ Tropomyosin	$(ii)$ Thin filament
$(c)$ Red muscle	$(iii)$ Sutures
$(d)$ Skull	$(iv)$ Involuntary

Long bones function as ........

Analogy type questions:
$(1)$ During muscle contraction,the $A$-band does not change in length.
$(2)$ The $8^{th}$,$9^{th}$,and $10^{th}$ pairs of ribs are attached to the $7^{th}$ pair of ribs with the help of hyaline cartilage. Identify the terms.

$A$ curved bone is structurally designed to