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| A sheet of cells that covers a body surface or lines a body cavity. |
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| Composed of a single cell layer. Typically found where absorbtion and filtration occur. |
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| Consits of two or more cell layers stacked one on top of the other. Common in high-abrasion areas. |
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| Boxlike, approximately as tall as they are wide. |
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| Secrete a productive lubricating mucus. |
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| Consists of one or more cells that make and secrete a particular product. |
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| Lose their ducts. Produce hormones that enter the blood or lymphatic fluid. |
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| Many of their products are familiar. Secrete their products onto body surfaces or into body cavities. |
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| A gland where the secretory cells form tubes. |
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| Glands where the secretory cells form small, flasklike sacs. |
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| Secrete their products by exocytosis as they are produced. |
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| Accumulate their products within them until they rupture. |
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| The unstructured material that fills the space between the cells and contains the fibers. |
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| Constructed primarily of the fibrous protein collagen. |
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| Long, thin fibers that form branching networks in the extracellular matrix. |
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| Short, fine, collagenous fibers and are continuous with collagen fibers. |
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| Embryonic tissues from which all connective tissues arise. |
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| When a body region is inflamed, the areolar tissue in the area soaks up excess fluids like a sponge, and the affected area swells and becomes puffy. |
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| A small space, cavity, or depression; lacunae in bone or cartilage are occupied by cells. |
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| Line body cavities that open to the exterior. "Wet" membranes. |
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| The moist membranes found in closed ventral body cavities. |
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| The first part of embryonic development. Lie one atop the next. The ectoderm, mesoderm, and endoderm. |
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| Embryonic germ layer; forms the epidermis of the skin and its derivatives, and nervous tissues. |
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| Primary germ layer that forms the skeleton and muscles of the body. |
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| Embryonic germ layer; forms the lining of the digestive tube and its associated structures. |
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