Tissues and membranes
Loose Connective Tissue "packing material" a. Review: Cells, Tissues, and Membranes Here is what we have learned from Cells, Tissues, and Membranes: Basically, a cell consists of three parts: the cell membrane, the nucleus, and between the two, the cytoplasm. Recent criminal charges detailed the illegal sale of untested body parts and tissue to hospitals, distributors and medical device manufacturers. The body uses this stored fat for energy, insulation, and organ protection. Opposite the free surface, the cells are attached to underlying connective tissue by a non-cellular basement membrane. The mesh, or network, that these fibers form help the organs that they support resist pull from many directions. It consists of two layers, the periosteal layer which lies closest to the calvaria, and the inner meningeal layer which lies closer to the brain. A neuroepithelium is specialized sensory epithelium. Characteristics: 1. Skin cells as well as those that line the stomach and intestines are continually being replaced.
After fertilization, the zygote gives rise many cells to form the embryo. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands.
Connective Tissue Fibers All tissue fibers are assembled from protein subunits secreted by fibroblasts. Establishes structural framework for the body.
Fibroblasts secrete protein subunits that form extracellular fibers collagen and elastic fibers and molecules that form the ground substance. Mucous, produced by the epithelial exocrine glands, covers the epithelial layer. Reticular Tissue This tissue is characterized by the predominance of reticular fibers.
Endothelium is the simple squamous epithelium that lines the interior of the heart chambers and blood vessels. Synoviocytes The intimal cells are termed synoviocytes and are of two types: fibroblastic type B and macrophagic type A. Either way its entry in the body, then get the lead in the blood, where it is directed either by tissue or the gut to be eliminated. The cytoplasm is the gel-like fluid between the cell membrane and the nucleus. Three serous membranes line the thoracic cavity; the two pleura that cover the lungs and the pericardium that covers the heart. Three Basic Components: 1. The Tissue Level of Organization 23 4. Skin cells as well as those that line the stomach and intestines are continually being replaced.
This tissue is highly vascular and provides the vascular support for epithelial tissue. Each of these categories is characterized by specific functions that contribute to the overall health and maintenance of the body. Avascularity Refers to the absence of blood vessels.
For now we will only concentrate on epithelial and connective tissues.
The intimal cells are termed synoviocytes and are of two types, fibroblastic type B synoviocytes and macrophagic type A synoviocytes.
based on 53 review