histology
Classification of histological tissues The tissues of the body are divided into four types: - epithelial - tissues of the internal environment - muscle - nervous Structural and functional units that form tissues are - histological elements. The cell is the main tissue-forming unit and the main histological element. Other histological elements: Symplast - a multinuclear structure formed by the fusion of identical cells. Syncytium - a structure consisting of cells connected by cytoplasmic bridges. Components of the intercellular substance make up the tissue matrix. Produced and secreted by cells. EPITHELIAL TISSUE: Many cells, little intercellular substance --- a layer is formed cells presence of a basement membrane: proteins - collagen type 4, laminin, entactin, fibronectin - in any basement membrane. presence of intercellular contacts belongs to avascular tissues and is nourished diffusely through the basement membrane regenerate well: especially pronounced in the integumentary e...