What are the phagocytic cells of loose connective tissue called?

The cells of connective tissue which produce histamine are

Refer to the given figure and identify the correct characteristic features.
$(i)$ It is a type of loose connective tissue.
$(ii)$ It contains fibroblasts,macrophages,collagen fibres,and mast cells.
$(iii)$ The cells of this tissue are specialized to store fats.
$(iv)$ It forms the inner lining of blood vessels,stomach,and intestine.

The membrane that covers cartilage is known as

Bone marrow is made up of

The percentage of inorganic and organic salts in the matrix of a bone is