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Definition
| A sheetlike tissue of cells that are close together, with little extracellular material between them. |
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Definition
| Saclike, secretory, organs that open to the free epithelial surface. |
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Definition
| They have ducts or tubes that open onto the free epithelial surface. They secrete many substances, such as oils, mucus, saliva, tears, milk, digestive enzymes, and earwax. |
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Definition
| They secrete their products, hormones, directly into interstitial fluid. They have no ducts. |
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Definition
| They are profuse in skin and other tissues subjected to ongoing abrasion. They function like spot welds and lock adjoining cells together. |
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Definition
| They stop most substances from leaking across a tissue. Rows of proteins fuse each cell to its neighbors and form tight seals. |
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Definition
| It helps hold organs and epithelia in place. Fibroblasts and fibers are dispersed widely through the matrix. |
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Term
| Fibrous, irregular connective tissue |
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Definition
| It is a component of skin. It supports intestinal muscles and also forms protective capsules around organs that do not stretch much. It is packed with many fibroblasts and collagen fibers that are positioned every which way. |
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Term
| Fibrous, regular connective tissue |
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Definition
| It has orderly rows of fibroblasts between parallel, tightly packed bundles of fibers. It helps keep the tissue from being torn apart when placed under mechanical stress. |
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Definition
| A tissue of fine collagen fibers packed in a rubbery, compression-resistant matrix. |
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Definition
| A hardened connective tissue with living cells imprisoned in their mineralized secretions. |
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Definition
| An energy reservoir tissue. |
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Definition
| A connective tissue whose cellular components arise from stem cells in bone. |
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Definition
| The functional partner of bone (or cartilage) that helps move and maintain the positions of the body and its parts. |
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Definition
| A type of tissue that is found only in the heart. It contains sacromeres and looks striated. It consists of single, branching cells that have a nucleus. |
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Definition
| A type of tissue that is found in the stomach, bladder, and uterus. It has single, unbranching cells, tapered at both ends, with one centrally positioned nucleus. |
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Definition
| Tissue that is composed of neurons and a variety of cells, collectively called neuroglia, that structurally and functionally support them. |
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Definition
| A kind of excitable cell that makes up the communication lines in most nervous system. |
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Definition
| A compartmentalization of functions that help the body survive in ways that no one tissue can offer. |
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Definition
| The outer layer of tissue. |
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Definition
| The middle layer of tissue. |
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Definition
| The inner primary tissue layer. |
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Definition
| The outer body covering of all vertebrate organ systems. |
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Definition
| A dense connective tissue with many fibers of stretch-resistant elastin and supportive collagen. |
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Term
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Definition
| A stratified squamous epithelium with an abundance of adhering junctions and no extracellurlar matrix. |
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Term
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Definition
| A steroid-like compound that help the body absorb calcium ions from food. |
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Term
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Definition
| Phagocytic cells engulf bacteria or viruses and notify the immune system of the threat. UV rays damage these cells. They migrate through the epidermis. |
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Definition
| Cells that secrete keratin, a tough, water-resistant protein that makes skin waterproof and more durable. |
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Definition
| Cells that produce the brownish-black pigment melanin, then give up these pigments to the keratinocytes. It is one of the body's barriers to the harmful UV radiation in the sun's rays. |
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Definition
| Tissues that support, protect, organize, or insulate other tissues. |
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