Többsejtség

Többsejtség, in biological terms, refers to multicellularity. It is the characteristic of organisms whose bodies are composed of more than one cell. This contrasts with unicellular organisms, which consist of a single cell. The development of multicellularity allowed for greater complexity and specialization of cells within an organism. Different cell types can perform specific functions, leading to the formation of tissues, organs, and organ systems. This division of labor enhances the efficiency and survival capabilities of the organism.

The evolutionary transition from unicellularity to multicellularity is a significant event in the history of life on Earth. While the exact mechanisms are still being researched, it is believed to have occurred independently multiple times in various lineages. Early multicellular organisms were likely simple colonies of similar cells that gradually evolved into more complex structures. This increased complexity enabled organisms to exploit new ecological niches and adapt to diverse environments. Examples of multicellular organisms span a vast range of life forms, including all plants, animals, and fungi, as well as many algae. The study of többsejtség is fundamental to understanding the diversity of life and the principles of biological organization.