In addition to participating in the formation of molecular sieves, structural proteins also affect cell attachment, movement, growth and differentiation through connection and mediation.

Interstitial fluid: water and some small molecular substances exuded from the arterial end of capillaries. It always maintains a dynamic balance in the matrix and forms the internal environment for the survival of tissues and cells.

It has toughness, strong tensile strength and poor elasticity. HE: pink wavy shape

HE: Red and thin fibers

Silver dyeing method: brown-black

The cytoplasm is weakly basophilic, and the nucleus is large, oval, with 1-2 nucleoli.

Functions: (1) Synthesize and secrete fibers in the intercellular matrix and proteoglycans in the matrix; 2) Accelerate wound healing when the body is traumatized.

The cytoplasm is weakly eosinophilic; the nuclei are deeply stained and the nucleoli are not obvious.

Function: 1. Phagocytosis 2. Antigen presentation 3. Secrete biologically active substances

Source: B lymphocytes are transformed after being stimulated by antigens Distribution: Lymphoid tissue, gastrointestinal tissue, respiratory tract and other lamina propria Function: has the function of synthesizing, storing and secreting antibodies

The cytoplasm is filled with thick basophilic and metachromatic granules Metachromatic granules contain heparin and histamine, which participate in anticoagulant effects and cause telangiectasia and increased permeability.