Bio 260 Tissue Level Organization and repair

Bio 260 Tissue Level Organization and repair - Chapter 4...

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Principles of Human Anatomy and Physiology, 11e 1 Chapter 4 The Tissue Level of Organization Lecture Outline
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Principles of Human Anatomy and Physiology, 11e 2 INTRODUCTION A tissue is a group of similar cells that usually have a similar embryological origin and are specialized for a particular function. The nature of the extracellular material that surrounds the connections between the cells that compose the tissue influence the structure and properties of a specific tissue. Pathologists , physicians who specialize in laboratory studies of cells and tissues, aid other physicians in making diagnoses; they also perform autopsies.
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Principles of Human Anatomy and Physiology, 11e 3 Chapter 4 The Tissue Level of Organization Histology the study of tissues
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Principles of Human Anatomy and Physiology, 11e 4 TYPES OF TISSUES AND THEIR ORIGINS Four principal types based on function and structure Epithelial tissue covers body surfaces, lines hollow organs, body cavities, and ducts; and forms glands. Connective tissue protects and supports the body and its organs, binds organs together, stores energy reserves as fat, and provides immunity. Muscle tissue is responsible for movement and generation of force. Nervous tissue initiates and transmits action potentials (nerve impulses) that help coordinate body activities.
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Principles of Human Anatomy and Physiology, 11e 5 Origin of Tissues Primary germ layers within the embryo endoderm mesoderm Ectoderm Tissue derivations epithelium from all 3 germ layers nerve tissue from ectoderm Table 29.1 provides a list of structures derived from the primary germ layers.
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Principles of Human Anatomy and Physiology, 11e 6 DEVELOPMENT Normally, most cells within a tissue remain in place, anchored to other cells a basement membranes connective tissues Exceptions include phagocytes and embryonic cells involved in differentiation and growth.
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Principles of Human Anatomy and Physiology, 11e 7 Biopsy Removal of living tissue for microscopic examination surgery needle biopsy Useful for diagnosis, especially cancer Tissue preserved, sectioned and stained before microscopic viewing
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Principles of Human Anatomy and Physiology, 11e 8 CELL JUNCTIONS Cell junctions are points of contact between adjacent plasma membranes. Depending on their structure, cell junctions may serve one of three functions. Some cell junctions form fluid-tight seals between cells. Other cell junctions anchor cells together or to extracellular material. Still others act as channels, which allow ions and molecules to pass from cell to cell within a tissue.
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Principles of Human Anatomy and Physiology, 11e 9 CELL JUNCTIONS The five most important kinds of cell junctions are tight junctions, adherens junctions, desmosomes, hemidesmosomes, and gap junctions (Figure 4.1)
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This note was uploaded on 06/20/2011 for the course BIOL 260 taught by Professor Martino during the Spring '10 term at Carthage.

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Bio 260 Tissue Level Organization and repair - Chapter 4...

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