Which tissue is mainly composed of fat-storing cells?

Bone marrow is made up of

Consider the following statements.
Statement-$I$: In tendons,collagen fibers are present in rows between many parallel bundles of fibers.
Statement-$II$: Skin is a dense regular connective tissue that has fibroblasts and collagen oriented differently.
Choose the correct option from the following.

Newborn mammals generally do not shiver despite lower outside temperatures because of:

All of the following cells produce collagen,$EXCEPT$:

Which of the following cells can release heparin and histamine in the blood?