Describe the location and function of the following:
$(i)$ Mast cells
$(ii)$ Hyaline cartilage

(N/A) $(i)$ Mast cells:
Location: Found in the matrix of areolar connective tissue.
Function: They secrete substances like Heparin (anticoagulant),Histamine (vasodilator),and Serotonin (vasoconstrictor) involved in inflammatory responses.
$(ii)$ Hyaline cartilage:
Location: Found in the embryonic skeleton,trachea,larynx,and at the ends of long bones.
Function: It provides structural support,flexibility,and a smooth surface for joint movement.