LYCOS RETRIEVER 
Cells: Tissues
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Cells in Motion - In multicellular tissues, such as those found in animals and humans, individual cells employ a variety of locomotion mechanisms to maneuver through spaces in the extracellular matrix and over the surfaces of other cells. Examples are the rapid movement of cells in developing embryos, organ-to-organ spreading of malignant cancer cells, and the migration of neural axons to synaptic targets. Unlike single-celled swimming organisms, crawling cells in culture do not possess cilia or flagella, but tend to move by coordinated projection of the cytoplasm in repeating cycles of extension and retraction that deform the entire cell. The digital videos presented in this gallery investigate animal cell motility patterns in a wide variety of morphologically different specimens.
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There are five main types of bone cells in bone tissue. Osteogenic cells respond to traumas, such as fractures, by giving rise to bone-forming cells and bone-destroying cells. Osteoblasts (bone-forming cells) synthesize and secrete unmineralized ground substance and are found in areas of high metabolism within the bone. Osteocytes are mature bone cells made from osteoblasts that have made bone tissue around themselves. These cells maintain healthy bone tissue by secreting enzymes and controlling the bone mineral content; they ... control the calcium release from the bone tissue to the blood. Osteoclasts are large cells that break down bone tissue.
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BioLife Solutions develops, manufactures and markets patented hypothermic storage and cryopreservation solutions for cells, tissues, and organs. The Company's proprietary HypoThermosol(R) and CryoStor(TM) platform of solutions are marketed to academic and commercial organizations involved in cell therapy, tissue engineering, cord blood banking, drug discovery, and toxicology testing. BioLife's products are serum-free and protein-free, fully defined, and are formulated to reduce or prevent preservation-induced, delayed-onset cell damage and death. BioLife's enabling technology provides academic and clinical researchers significant improvements in post-thaw cell, tissue, and organ viability and function. For more information please visit http://www.biolifesolutions.com.
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All living organisms on Earth are divided in pieces called cells. There are smaller pieces to cells that include proteins and organelles. There are ... larger pieces called tissues and systems. Cells are small compartments that hold all of the biological equipment necessary to keep an organism alive and successful on Earth.
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The name goblet cell derives from the characteristic shape of these cells in conventionally-fixed tissues: a narrow base and expanded apical portion that sometimes extends into the lumen. This morphology, as seen to the right in a section of cat small intestine (H&E stain), is known to be an artifact of fixation in which mucus-laden granules in the apical portion of the cell expand, causing the cell to balloon. If special precautions are taken during fixation, goblet cells are seen as cylindrical cells
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Mitochondria are self-replicating organelles that occur in various numbers, shapes, and sizes in the cytoplasm of all eukaryotic cells. As mentioned earlier, mitochondria contain their own genome that is separate and distinct from the nuclear genome of a cell. Mitochondria have two functionally distinct membrane systems separated by a space: the outer membrane, which surrounds the whole organelle; and the inner membrane, which is thrown into folds or shelves that project inward. These inward folds are called [C]ristae. The number and shape of cristae in mitochondria differ, depending on the tissue and organism in which they are found, and serve to increase the surface area of the membrane.
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