In which year was the term 'Protoplasm' first coined?

The term 'Protoplasm' was first coined in 1839 by Jan Evangelista Purkinje, a Czech physiologist. Protoplasm refers to the living fluid substance within a cell that contains all the necessary cellular components, including the cell membrane, cytoplasm, organelles, and genetic material. The discovery and study of protoplasm were essential in the development of cell biology and the understanding of the basic unit of life.