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In histology (microscopic anatomy), the lobules of liver, or hepatic lobules, are small divisions of the liver defined at the microscopic scale. The hepatic lobule is a building block of the liver tissue, consisting of a portal triad, hepatocytes arranged in linear cords between a capillary network, and a central vein.
the salivary glands of the tongue [2] the liver; the lacrimal glands; the mammary glands; the pancreas [3] the bulbourethral (Cowper's) glands; The thyroid follicles can also be considered of acinar formation but in this case the follicles, being part of an endocrine gland, act as a hormonal deposit rather than to facilitate secretion.
Each respiratory bronchiole supplies the alveoli held in each acinus accompanied by a pulmonary artery branch. The pulmonary lobule is the portion of the lung ventilated by one bronchiole. Bronchioles are approximately 1 mm or less in diameter and their walls consist of ciliated cuboidal epithelium and a layer of smooth muscle .
The whole membrane however is only between 0.2 μm at its thinnest part and 0.6 μm at its thickest. [14] In the alveolar walls there are interconnecting air passages between the alveoli known as the pores of Kohn. The alveolar septum that separates the alveoli in the alveolar sac contains some collagen fibers and elastic fibers.
Each acinus is located at the terminal part of the gland connected to the ductal system, with many acini within each lobule of the gland. Each acinus consists of a single layer of cuboidal epithelial cells surrounding a lumen, a central opening where the saliva is deposited after being produced by the secretory cells.
SIPE is estimated to occur in 1-2% of competitive open-water swimmers, with 1.4% of triathletes, [2] 1.8% of combat swimmers and 1.1% of divers and swimmers [4] reported in the literature. Fatal cases can be mistaken for drowning because in both SIPE and drowning the lungs are heavy and filled with fluid, so post mortem findings may be similar.
Type Description Location simple branched acinar: thyroid glands tubuloalveolar or tubulo-alveolar or tubulo-acinar or compound tubulo-acinar or compound tubuloalveolar [4]: glands that start out as simple branched tubular, and branch further to terminate in alveoli
Similarly, since the blood arriving in the alveolar capillaries has a partial pressure of CO 2 of also about 6 kPa (45 mmHg), whereas that of the alveolar air is 5.3 kPa (40 mmHg), there is a net movement of carbon dioxide out of the capillaries into the alveoli. The changes brought about by these net flows of individual gases into and out of ...