History: Dujardin (1835) - discovered the protoplasm and named as "sarcode". J.E. Purkinje (1839) - first introduced the term 'Protoplasm'. J.S. Huxley (1868) - defined protoplasm as 'the physical basis of life'. O. Hertwig (1892) - proposed "Protoplasmic Theory" which states that all living matter, of which animals and plants are formed, is protoplasm. Protoplasm (Gr. Protos = first, plasma [...]
Synonyms: Extra cytoplasmic organelle, apparatus of heredity, director of cell, control room, or 'heart of cell' or cell brain. History: A V. Leeuwenhoek (1672): First observed nucleus in the RBC of Salmon fish. Robert Brown (1831): He first described and named the term nucleus in orchid root cells. Strasburger (1882): He proved that nucleus arise from pre-existing nucleus by division [...]
Synonyms: Cellular exoskeleton or extracellular matrix (ECM) of plant cell. Discovery: Robert Hooke (1665) discovered cell wall when he observed dead empty cells in a very thin slice of cork under his microscope. Definition: Cell wall is the thick, rigid, non-living, semi-elastic, transparent, specialized form of protective extra-cellular matrix that present outside the plasma lemma of cells. Occurrence: Found in [...]