Mast cells contain cytoplasmic granules that stain strongly with basic dyes. The release of histamine results in the contraction of smooth muscle and the dilation of capillaries. Mast cells possess Fc receptors at their surfaces that bind IgE and thereby, sensitize them to future antigen exposure. This signals a change in the cells leading to degranulation and release of granule contents. Plasma cells are derived from B-lymphocytes.
Plasma cells are involved in the synthesis and secretion of circulating antibodies.
Pus is formed by the accumulation of dead neutrophils. A Brief Introduction Cartilage cells are embedded in a hydrated gel of ECM termed the cartilage matrix . Cartilage cells are called chondrocytes in mature cartilage. Individual chondrocytes reside in small spherical cavities termed lacunae . Chondrocytes are derived from chondroblasts , which are responsible for growth of the cartilage matrix in juvenile tissue.