commonly keratinized. B) Stratified epithelia are associated with filtration. C) Endothelium provides a slick surface lining all hollow cardiovascular organs. D) Simple epithelia are commonly found in areas of high abrasion. 4. A multilayered epithelium with cuboidal basal cells and flat cells at its surface would be classified as ________. A) stratified squamous B) transitional C) simple cuboidal D) simple squamous 5. Which of these is not considered connective tissue? A) adipose
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indicated the epithelial and mesenchymal cells in the PTK7 knockout epidymides were less organized compared to the control. Although the basal to apical polarity of epithelial cells and the formation of extracellular matrix (ECM) at the base of epithelium did not impaired by PTK7 ablation‚ the myosin II activity was affected in the surrounding mesenchymal cells of epididymal duct after loss of PTK7 in the epididymis. In addition‚ at E18.5 coiling is proceeding in a proximal to distal manner‚ with
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Due to its anatomical structure‚ this thin and permeable epithelium is found in areas of the body where protection is not important and where there is a high demand for filtration or exchange of substances by rapid diffusion. Along with rapid diffusion‚ simple squamous epithelium secretes lubricating substances in serosae which keeps the surface smooth and reduces the overall amount of surface friction. This highly permeable epithelium can be found in the kidney glomeruli; lining of heart‚ blood
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Exercise for Histology (for digestive gland) I. Multichosen questions: 1. The B cells in islet of Langerhans secrete ( B ). A. glucagon B. insulin C. serotonin D. pepsin E. trypsin 2. The perisinusoidal space ( space of Disse ) in hepatic lobule is located between ( C ). A. two adjacent hepatocytes B. hepatic macrophage and endothelium of hepatic sinusoid C. hepatocyte and endothelium of hepatic sinusoid D. hepatic plate and hepatic plate E
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firmly attached to one another along a wavy borderline. The epidermis (epi = upon) composed of epithelial cells‚ and is the outermost protective shield of the body. Epidermis - Structurally‚ the epidermis is a thick keratinued stratified squamous epithelium consisting of four distinct cell types and five distinct layers. Cells of the Epidermis - Cells populating the epidermis include: keratinocytes‚ melanocytes‚ Merkel cells‚ and tactile cells. Keratinocytes: The most numerous cells are the keratinocytes
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As the name implies‚ connective tissue serves a "connecting" function. It supports and binds other tissues in the body. Unlike epithelial which has cells that are closely packed together‚ connective tissue typically has cells scattered throughout an extracellular matrix of fibrous proteins and glycoproteins attached to a basement membrane. Loose Connective Tissue In vertebrates‚ the most common type of connective tissue is loose connective tissue. It holds organs in place and attaches epithelial
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Unit 3 Lecture Study Guide 1. List the 4 primary tissue types and give the general characteristics and functions of each one. a. Epithelium - 1) It protects us from the outside world – skin. 2) Absorbs – stomach and intestinal lining (gut). 3) Filters – the kidney. 4) Secretes – forms glands. Characteristics (Traits): 1) Closely attached to each other forming a protective barrier. 2) Always has one free (apical) surface open to outside the body or inside (cavity) an
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cells closely packed and ranged in one or more layers. There are two kinds of epithelial tissues‚ these are the covering and lining epithelium which covers or lines almost all of your internal and external body for example‚ the outermost layer of your skin and other main organs‚ and the internal surface lining of digestive system. Then there is the glandular epithelium which secretes hormones or other products such as stomach acid‚ sweat‚ saliva‚ and milk. Epithelial tissue can be divided into two
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protection; secretion and absorption. Simple epithelium consists of a single layer of identical cells‚ which are divided into three main types. The types are named depending on their shape which alters according to the functions they carry out. The more the tissue gets used‚ the taller the cells. Simple epithelium is usually found on absorptive or secretory surfaces‚ where it helps to speed up these processes due to the single layer of cells. Simple Epithelium can be squamous‚ cuboidal‚ columnar or ciliated
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‘scaly’ in reference to flatness of the cells. They fit closely together. As these cells are rather delicate they cannot offer much protection and their main function is to allow materials pass through via diffusion and osmosis. Simple squamous epithelium is found within the walls of: -lung alveoli -blood capillaries -Bowman’s capsule of nephrons Cuboidal epithelial cells are normally cube-shaped with spherical nuclei. They often line ducts and tube and allow other materials to pass through in a
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