External ear $(pinna)$ contains a hard, flexible structure composed of

The polysaccharide found in the matrix of cartilage is known as ..........

The cells of connective tissue which produce histamine are

$A$: The cells that produce and secrete fibres are called fibroblasts.
$R$: Fibroblasts are the characteristic cells of all types of connective tissue.

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.

During an injury,the nasal septum gets damaged. Which cartilage is involved?