Sejthalmazs

Sejthalmazs is a biological term describing a multicellular aggregate formed when cells adhere to one another to form a cohesive cluster. Sejthalmazs can range from loosely associated groups to compact, three-dimensional assemblies and may serve as transient developmental structures or more stable tissue-like formations in various organisms.

Formation and structure: They arise through cell division with incomplete separation, active cell migration followed by adhesion, or aggregation driven by signaling cues and chemotaxis. The cells in a Sejthalmazs are joined by intercellular adhesion molecules such as cadherins and integrins, and often embedded in a local extracellular matrix that supports mechanical integrity. Morphology varies by tissue type and stage—ranging from rounded microclusters to rosette- or finger-shaped configurations.

Occurrence: Sejthalmazs are observed in multiple biological contexts, including early embryogenesis where cell masses organize into morula-like structures, in fungal and algal colonies, and in mammalian cell cultures as microcolonies or tumor cell clusters. In pathology, the formation of cell clusters can influence invasion and treatment response.

Significance: Studying Sejthalmazs informs understanding of cell communication, tissue morphogenesis, and the transition between single cells and tissues. They are used in developmental biology, cancer research, and tissue engineering where controlled clustering supports three-dimensional tissue assembly.

See also: Cell cluster, Morula, Organoid.