Answer:
(d) The matrix of cartilage has delicate-network of
collagen fibres and chondrocytes (living cells). These are present in
fluid-filled spaces called lacunae. Chondrocytes multiply by mitosis and help
in internal growth of cartilage.
A mast cell is a resident granulocyte of several type of
tissue. It contains granules rich in histamine and heparin. They play a key
role in allergy and are involved in wound healing and defense against
pathogens.
Basophils are granulocytes of white blood cells (WBCs) and
are involved in function of body defence by engulfing bacteria and other
foreign substances.
Osteocytes are the bone cells.
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