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  2. Basement membrane - Wikipedia

    en.wikipedia.org/wiki/Basement_membrane

    The basement membrane, also known as base membrane, is a thin, pliable sheet-like type of extracellular matrix that provides cell and tissue support and acts as a platform for complex signalling. [ 1 ] [ 2 ] The basement membrane sits between epithelial tissues including mesothelium and endothelium , and the underlying connective tissue.

  3. Basal lamina - Wikipedia

    en.wikipedia.org/wiki/Basal_lamina

    The glomerular basement membrane is a special case, consisting of a fusion of the podocyte and endothelial basal laminas, and lacking a lamina reticularis. Thus, it consists of an especially thick lamina densa, sandwiched on its inside and outside by layers of lamina lucida / rara (one from each cell type).

  4. Epithelial polarity - Wikipedia

    en.wikipedia.org/wiki/Epithelial_polarity

    Cell shape and contacts provide the likely mechanism. Lateral membranes are the site of contact between epithelial cells, whereas basal membranes connect epithelial cells to the basement membrane, an extracellular matrix layer that lies along the basal surface of the

  5. Epithelium - Wikipedia

    en.wikipedia.org/wiki/Epithelium

    The basement membrane acts as a selectively permeable membrane that determines which substances will be able to enter the epithelium. [2]: 3 The basal lamina is made up of laminin (glycoproteins) secreted by epithelial cells. The reticular lamina beneath the basal lamina is made up of collagen proteins secreted by connective tissue.

  6. Basal cell - Wikipedia

    en.wikipedia.org/wiki/Basal_cell

    A basal cell is a general cell type that is present in many forms of epithelial tissue throughout the body. Basal cells are located between the basement membrane and the remainder of the epithelium, effectively functioning as an anchor for the epithelial layer and an important mechanism in the maintenance of intraorgan homeostasis.

  7. Lamina propria - Wikipedia

    en.wikipedia.org/wiki/Lamina_propria

    The lamina propria is a thin layer of loose (areolar) connective tissue, which lies beneath the epithelium, and together with the epithelium and basement membrane constitutes the mucosa. As its Latin name indicates, it is a characteristic component of the mucosa, or the mucosa's "own special layer."

  8. Epidermis - Wikipedia

    en.wikipedia.org/wiki/Epidermis

    Langerhans cells, immunologically active cells, are located in the middle of this layer. [11] basal/germinal layer (stratum basale/germinativum) Confocal image of the stratum basale already showing some papillae Composed mainly of proliferating and non-proliferating keratinocytes, attached to the basement membrane by hemidesmosomes.

  9. Pericyte - Wikipedia

    en.wikipedia.org/wiki/Pericyte

    Many types of integrin molecules facilitate communication between pericytes and endothelial cells separated by the basement membrane. [6] Pericytes can also form direct connections with neighboring cells by forming peg and socket arrangements in which parts of the cells interlock, similar to the gears of a clock.