Stroma and parenchyma
Most organs are made up of two components: the functional cells and tissues, termed parenchyma; and a supportive framework, called stroma. Typical parenchymal components vary with the function of the organ, but are usually composed of epithelium, muscle, or nervous tissues; occasionally, connective tissue also serves as parenchyma. Stroma is usually composed of connective tissue. 200x
Parenchyma >
In the mucosa of the fundic stomach, the surface epithelium (black arrows) and glands (green arrows) form the functional portion, or parenchyma.
Stroma >
Connective tissue proper, lying beneath the surface epithelium and surrounding the glands, forms the stroma. The gelatinous ground substance of this loose connective tissue provides good padding for the epithelium, supports the glands and allows for diffusion. Delicate collagen fibers are the predominant fiber type in this stroma.
Lumen
Connective tissue proper, lying beneath the surface epithelium and surrounding the glands, forms the stroma. The gelatinous ground substance of this loose connective tissue provides good padding for the epithelium, supports the glands and allows for diffusion. Delicate collagen fibers are the predominant fiber type in this stroma.
