Cell types. Extracellular matrix. Ground substance. Fibers • Collagen fiber • Elastic fiber • Reticular fiber. Macrophage. Fibroblast. Lymphocyte. Fat cell. Capillary. Mast cell. Neutrophil. Figure 4.7. Connective Tissue: Embryonic. Mesenchyme—embryonic connective tissue
• Collagen fiber
• Elastic fiber
• Reticular fiber
Teratomas are made up of a variety of parenchymal cell types representing more than 1 germ layer. The most common location is sacrococcygeal (57%). Because some arise from totipotential cells, they are encountered commonly in the gonads (29%). By far, the most common gonadal location is the ovary. Cells differentiate along various germ lines, essentially recapitulating any tissue of the body. Examples include hair, teeth, fat, skin, muscle, and endocrine tissue
(b) Mucous membranes line body cavitiesopen to the exterior.
(c) Serous membranes line body cavitiesclosed to the exterior.