| D008854 |
Microscopy, Electron |
Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen. |
Electron Microscopy |
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| D008928 |
Mitochondria |
Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed) |
Mitochondrial Contraction,Mitochondrion,Contraction, Mitochondrial,Contractions, Mitochondrial,Mitochondrial Contractions |
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| D009186 |
Myelin Sheath |
The lipid-rich sheath surrounding AXONS in both the CENTRAL NERVOUS SYSTEMS and PERIPHERAL NERVOUS SYSTEM. The myelin sheath is an electrical insulator and allows faster and more energetically efficient conduction of impulses. The sheath is formed by the cell membranes of glial cells (SCHWANN CELLS in the peripheral and OLIGODENDROGLIA in the central nervous system). Deterioration of the sheath in DEMYELINATING DISEASES is a serious clinical problem. |
Myelin,Myelin Sheaths,Sheath, Myelin,Sheaths, Myelin |
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| D009441 |
Neurilemma |
The outermost cytoplasmic layer of the SCHWANN CELLS covering NERVE FIBERS. |
Neurolemma,Schwann Sheath,Sheath, Schwann |
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| D010525 |
Peripheral Nerves |
The nerves outside of the brain and spinal cord, including the autonomic, cranial, and spinal nerves. Peripheral nerves contain non-neuronal cells and connective tissue as well as axons. The connective tissue layers include, from the outside to the inside, the epineurium, the perineurium, and the endoneurium. |
Endoneurium,Epineurium,Perineurium,Endoneuriums,Epineuriums,Nerve, Peripheral,Nerves, Peripheral,Perineuriums,Peripheral Nerve |
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| D006801 |
Humans |
Members of the species Homo sapiens. |
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man |
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| D001369 |
Axons |
Nerve fibers that are capable of rapidly conducting impulses away from the neuron cell body. |
Axon |
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| D012583 |
Schwann Cells |
Neuroglial cells of the peripheral nervous system which form the insulating myelin sheaths of peripheral axons. |
Schwann Cell,Cell, Schwann,Cells, Schwann |
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| D012867 |
Skin |
The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS. |
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| D012871 |
Skin Diseases |
Diseases involving the DERMIS or EPIDERMIS. |
Dermatoses,Skin and Subcutaneous Tissue Disorders,Dermatosis,Skin Disease |
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