Sejtközi

Sejtközi refers to the space between cells in biological tissues. This extracellular matrix, or interstitial space, is not an empty void but a complex network of molecules that plays a crucial role in tissue structure, cell function, and communication. The composition of the sejtközi varies depending on the tissue type and its specific needs. Key components include water, ions, small molecules, and macromolecules such as collagen, elastin, proteoglycans, and glycoproteins.

The sejtközi provides mechanical support and anchors cells within tissues, contributing to their overall integrity. It also acts as a medium for the diffusion of nutrients, oxygen, and waste products between cells and blood vessels. Furthermore, the extracellular matrix is a dynamic environment that influences cell behavior, including cell adhesion, migration, proliferation, and differentiation. Signaling molecules embedded within or released from the sejtközi can bind to cell surface receptors, initiating intracellular pathways that regulate various cellular processes. Dysregulation of sejtközi composition or function is implicated in numerous pathological conditions, including fibrosis, inflammation, and cancer. Understanding the molecular composition and biological roles of the sejtközi is therefore fundamental to comprehending tissue homeostasis and disease pathogenesis.