which layer functions by secreting a lubricating fluid?
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- Link to: 23.1 The GI tract 9. This layer of the GI tract is composed of areolar connective tissue that binds the mucosa to the muscularis. A) Submucosa B) Lamina propria C) Epithelium D) Serosa E) None of the above Ans: A Link to: 23.1 The GI tract 10. This layer functions by secreting a lubricating fluid. A) Serosa B) Submucosa C) Muscularis D) Mucosa E) MALT Ans: A Link to: 23.6 In the small intestine 11. These are composed of prominent lymphatic nodules that function in the immune response.
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Chapter 6: Integumentary System Serous membranes are characterized by ______, whereas mucous membranes are characterized by ______. a. lining body cavities that lack openings to the outside; lining body cavities and tubes opening to the outside. b. being composed of connective tissue only; being composed of epithelial tissue only. c. secreting synovial fluid that lubricates joint surfaces; secreting mucus.
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24 4.2 Epithelial Tissue Its primary function is to provide a smooth and protective surface. Mesothelial cells are squamous epithelial cells that secrete a fluid that lubricates the mesothelium. In simple cuboidal epithelium, the nucleus of the box-like cells appears round and is generally located near the center of the cell.
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- It contains water and proteins and is secreted by small glands in the conjunctiva and the larger lacrimal gland. The aqueous layer makes up the majority of the tear volume and is responsible for tear spreading. Mucous Layer: The mucous layer works as an anchor to hold the tear film to the eye.
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- Describe the histology of the small intestine. The outermost layer of the intestine, the serosa, is a smooth membrane consisting of a thin layer of cells that secrete serous fluid, and a thin layer of connective tissue. The muscularis is a region of muscle adjacent to the submucosa membrane.
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Tears Basal tears. In healthy mammalian eyes, the cornea is continually kept wet and nourished by basal tears. They lubricate the eye, and help to keep it clear of dust. Tear fluid contains water, mucin, lipids, lysozyme, lactoferrin, lipocalin, lacritin, immunoglobulins, glucose, urea, sodium, and potassium.he lacrimal glands secrete lacrimal fluid, which flows through the main excretory ducts into the space between the eyeball and lids. When the eyes blink, the lacrimal fluid is spread across the surface of the eye.
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Epithelial Cells alveolar = air sac   simple squamous epithelium; single layer of flattened cells with disc-shaped central nuclei and sparse cytoplasm; the simplest of the epithelium.…   function: allows passage of materials by diffusion and filtration in sites where protection is not important; secretes lubricating substances in serosae.
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Trachea The trachea is lined with a moist mucous-membrane layer composed of cells containing small hairlike projections called cilia. The cilia project into the channel (lumen) of the trachea to trap particles. There are also cells and ducts in the mucous membrane that secrete mucus droplets and water molecules.
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- Which of the light micrographs in the figure below shows the type of epithelial tissue whose functions include filtration, diffusion, osmosis, and secretion in serous membranes? a) a b) b c) c d) d e) e 66.
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Urinary Bladder The urinary bladder is made of several distinct tissue layers: 1  The innermost layer of the bladder is the mucosa layer that lines the hollow lumen. 2  Surrounding the mucosal layer is the submucosa, a layer of connective tissue with blood vessels and nervous tissue that supports and controls the surrounding tissue layers. The visceral muscles of the muscularis layer surround the submucosa and provide the urinary bladder with its ability to expand and contract.
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- The muscularis mucosa allows for movement of the mucosa independent of the wall of the digestive tract, thereby increasing its contact with food. In most of the alimentary canal, the muscularis mucosa consists of an inner circular and outer longitudinal layer of smooth muscle.The Submucosa: The submucosa consists of moderately dense irregular connective tissue. It contains blood and lymph vessels and nerve plexi.n most of the digestive tract, the muscularis externa consists of an inner circular and outer longitudinal layer of smooth muscle. The inner circular layer is arranged in a tight spiral, and its contraction results in the mixing of food by constricting the lumen of the tube.
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What is the function of the serous membranes of the body? Each serous membrane is composed of a secretory epithelial layer and a connective tissue layer underneath. 1  The epithelial layer, known as mesothelium, consists of a single layer of avascular flat nucleated cells (simple squamous epithelium) which produce the lubricating serous fluid.ach serous membrane is composed of a secretory epithelial layer and a connective tissue layer underneath. 1  The epithelial layer, known as mesothelium, consists of a single layer of avascular flat nucleated cells (simple squamous epithelium) which produce the lubricating serous fluid.
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lacrimal fluid The field covering the anterior surface of the cornea which consists of lacrimal fluid and of the secretion of the meibomian and conjunctival glands.t is composed of three layers: (1) The deepest and densest is the mucin layer (or mucous layer) which derives from the conjunctival goblet cells, as well as some secretion from the lacrimal gland. (2) The watery lacrimal fluid is the middle layer, called the lacrimal (or aqueous layer).
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What is the function of serous membranes? serous membranes line the thoracic and abdominopelvic cavities and cover visceral organs. they are composed of thin sheets of epethelial tissue that lubricate, support, and co … mpartmentalize visceral organs. serous fluid is the watery lubricant they secrete.
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Liquifilm tears (polyvinyl alcohol) The tear film is kept stable by mucin which is secreted by a thin membrane covering the front of the eye, called the conjunctiva. Dry eyes result from a reduced production of tears, a reduced production of mucin by the conjunctiva, or increased evaporation of tears from the surface of the eye.
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The Male Reproductive System The function of the prostate is to store and secrete a slightly alkaline fluid, milky or white in appearance, that usually constitutes 25-30% of the volume of the semen along … with spermatozoa and seminal vesicle fluid.
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Anatomy The cecum consists of four distinct tissue layers that work together to achieve the organ’s function. 1  The innermost layer, the mucosa, is made of smooth mucous membrane with many goblet cells. Goblet cells secrete mucus to lubricate and protect the surface of the cecum.
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- Two Methods: Treating Dry Skin Under Your Nose Preventing Dry Skin Under Your Nose Community Q&A. Cold weather, using irritating facial products and some skin conditions (such as eczema or runny nose during a cold) can cause the skin under your nose to dry. Dry skin is usually not a serious health problem and can be cared at home with simple remedies.
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Freiburg im Breisgau Freiburg im Breisgau. Freiburg im Breisgau, city, Baden-Württemberg Land (state), southwestern Germany. It is picturesquely situated on the western slopes of the Black Forest, where the Dreisam River flows into the Rhine valley. It was founded and chartered in 1120 by the dukes of Zähringen as a free market town (hence its name).
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Digestion The mucosal layer also consists of a thin layer of muscle tissue. This is referred to as the muscularis mucosa. The main function of this portion of the mucosa is to aid in propelling nutrients in a uniform direction from the lumen to the submucosa.
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- The submucosa is the next layer toward the outside and contains the submucosal glands. These large purple-staining glands produce mucus which lubricates the esophagus. A layer of loose connective tissue is found external to the glands (orangish in color).
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Synovial Joints The joint is surrounded by an articular capsule which is fibrous in nature and is lined by synovial membrane. Because of its rich nerve supply the fibrous capsule is sensitive to stretches imposed by movements. The synovial membrane lines the entire joint except the articular surfaces covered by hyaline cartilage. It is this membrane that secretes the slimy fluid called synovial fluid which lubricates the joint and nourishes the articular cartilage. Varying degrees of movements are always permitted by the synovial joints.
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What is the Visceral Pericardium? The inner coat is double with one layer closely adherent to the heart while the other lines the inner surface of the outer coat with the intervening space being filled with fluid. This small amount of fluid, the pericardial fluid, acts as a lubricant to allow normal heart movement within the chest.
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What is the tear film? The tear film consists of three layers: An oily layer. A watery layer. A layer of mucus. Each layer has its own purpose. The oily layer, produced by the meibomian glands, forms the outermost surface of the tear film. Its main purpose is to smooth the tear surface and reduce evaporation of tears. The middle watery layer makes up most of what we ordinarily think of as tears.
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skin They secrete the oil that keeps the skin surface lubricated. Beneath the corium is a layer of subcutaneous tissue. This tissue helps insulate the body against heat and cold, and cushions it against shock. The hair and nails are outgrowths of the skin.
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- The lumen of the trachea is lined by pseudostratified columnar epithelium. Note that all the surface cells have cilia at their free (apical) surface. (What function do these cilia serve in the trachea?) Mucus-secreting unicellular gland cells (goblet cells) are interspersed among the ciliated cells.