have simple squamous epithelium and other areas have stratified squamous epithelium? Stratified squamous epithelium is used in areas of the body that undergo more abrasion (Epithelial Cells) than then areas of the body that require just having simple squamous epithelium (Epithelial Cells). Examples of areas that need stratifies squamous epithelium are the outmost layer of skin as well as the lining of the mouth and esophagus. In contrast‚ areas that use simple squamous epithelium include capillaries
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THE ORGANISATION OF THE HUMAN BODY By Rachel Bull CELLS The organelles of cells and their function • Cell (or plasma) membrane - The plasma membrane acts as a boundary and controls what substances can enter and exit the cell. • Cytoplasm - This semi-fluid substance found inside the boundary of the cell and outside the nucleus cushions and protects the internal organelles‚ this is also where the majority of the chemical reactions happen. • Nucleus - The nucleus is the double-membraned central
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destroy normal tissue architecture (1‚2). Collagen fibers also become more organized‚ blood vessels are restored to normal‚ scar tissue is eliminated‚ and epithelial and/or endothelial cells divide and migrate over the basal layers to regenerate the epithelium or endothelium‚ respectively‚ restoring the damaged tissue to its normal appearance. Persistent inflammation‚ tissue necrosis‚ and infection lead to chronic myofibroblast activation and excessive accumulation of ECM components‚ which promotes the
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form form deeper tissues by diffusion. TWO TYPES OF EPITHELIAL TISSUES 1. 2. Simple epithelium a) Simple squamous epithelium b) Simple cuboidal epithelium c) Simple columnar epithelium Compound epithelium a) Stratified squamous epithelium b) Stratified cuboidal epithelium c) Stratified columnar epithelium d) Transitional epithelium SIMPLE SQUAMOUS EPITHELIUM The structure of the squamous epithelium is a single layer of flat cells. In the center of the cell‚ there is a single spherical nucleus
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Sources from : http://intranet.tdmu.edu.ua/data/kafedra/internal/anatomy/classes_stud/en/nurse/1/22%20Nasal%20cavity‚%20larynx.%20Trachea‚%20bronchi‚%20lungs.htm THE LUNGS The left and right lungs (Figure 23-7a‚ b) are situated in the left and right pleural cavities. Each lung is a blunt cone‚ with the tip‚ or apex‚ pointing superiorly. The apex on each side extends into the base of the neck superior to the first rib. The broad concave inferior portion‚ or base‚ of each lung rests on the superior
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be very apparent. Meissner bodies are mechanoreceptors that allow humans to have a refined tactile touch ability. As we travel downwards toward the stratum reticulare‚ we can observe blood vessels which inner layer is made up of simple squamous epithelium and an outer lining of smoot muscle. Fig 7(e) might not be too clear‚ but upon closer inspection‚ the inner lining has cells with rounder nucleus compared to the cells above them‚ which have a more flattened appearance. The flattened appearance
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cells. Tissues are composed of matrix and cells. The intracellular junction shown within the circle is a desmosome. A tissue found at surfaces composed of one or more layers of closely adhearing cells‚ is called epithelium tissue. A specialized layer that serves to anchor an epithelium to the tissues below it is called the basement membrane The type of cell junction that holds cells together and seals off the space between adjacent cells making it difficult for substances to pass between cells
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epithelial tissue. First there is simple squamous epithelium tissue. This is a single layer of cells that is in the lining of blood vessels‚ the lining of the pulmonary alveoli‚ and the Bowman’s capsule in the kidneys. The function of this tissue is to separate blood from the fluid in tissues and to separate air from fluids in tissues and to filter substances from blood to form urine. The next type of epithelial tissue is stratified squamous epithelium. This is a tissue composed of two or more layers
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Classification of Epithelial Tissue Location of Epithelium The four basic tissue types in the body are the epithelial‚ connective‚ muscular‚ and nervous tissue. These tissues exist and function in close association with one another. The epithelial tissue‚ or epithelium‚ consists of sheets of cells that cover the external surfaces of the body‚ line the internal cavities‚ form various organs and glands‚ and line their ducts. Epithelial cells are in contact with each other‚ either in a single
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epithelial tissues. 3. What are the functions of epithelial tissues? Epithelial tissues perform the following functions: i) Protection: they protect the underlying tissues from drying‚ injury‚ infections and from harmful chemicals. Epithelium also produces exoskeletal structures like hair‚ nails‚ hoofs‚ horns‚ scales etc ii) Absorption: they form the lining of the intestine and absorb digested food and nutrients and water. iii) Excretion: they form the lining of kidney tubules
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