what shape are serous acini?
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An acinus (from Latin, grape) is a small ball of secretory epithelial cells containing a tiny central lumen. Acini are usually formed by serous cells. [Acini are sometimes called alveoli, from L., small cavity.] A typical acinar cell is shaped like a pyramid.
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Keratosis pilaris (ker uh TOH siss pill AIR iss) is a dry skin type. It looks like dry, rough, small bumps that are flesh-colored or pink and can feel like sandpaper or chicken skin. It is usually not itchy. The most common areas for these bumps are on the back of the arms, front of the thighs and face (cheeks).
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['Cherry angiomas. Those small, smooth red bumps that suddenly appear on your skin – especially on your torso – are most likely cherry angiomas. ... ', 'Cysts. ... ', 'Dermatofibromas. ... ', 'Folliculitis. ... ', 'Hives. ... ', 'Keloids. ... ', 'Lipomas. ... ', 'Moles.']
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Types of spots whiteheads – have a similar appearance to blackheads, but may be firmer and will not empty when squeezed. papules – small red bumps that may feel tender or sore. pustules – similar to papules, but have a white tip in the centre, caused by a build-up of pus.
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Acral lentiginous melanoma (ALM) is a specific type of melanoma that appears on the palms of the hands, the soles of the feet, or under the nails. Melanocytes contain your skin color (known as melanin or pigment). In this type of melanoma, the word “acral” refers to the occurrence of the melanoma on the palms or soles.
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Superficial candidal skin infections appear as a red flat rash with sharp, scalloped edges. Smaller patches of similar-appearing rash, known as "satellite lesions" or "satellite pustules," are usually nearby. These rashes may be hot, itchy, or painful. Intertrigo appears as softened red skin in body fold areas.
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['Unsegmented soft body with bilateral symmetry.', 'Presence of an internal or external shell.', 'A toothed tongue (made mostly of chitin) called the radula.', 'A mantle which is a fold in the body wall that lines the shell.', 'Muscular foot (and/or tentacles in some).']
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['dermoid cysts: sac-like growths on the ovaries that can contain hair, fat, and other tissue.', 'cystadenomas: noncancerous growths that can develop on the outer surface of the ovaries.']
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The keel (carina) is a backbone-like ridge that runs the length of the back in some slug species. That blowhole on the side is called the pneumostome and leads to the slug's lung. Slugs can swing their two retractable, light-sensitive optical tentacles independently to gaze at their surroundings.
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['large circular folds called plicae circulares (shown in the diagram to the right), most numerous in the upper part of the small intestine.', 'smaller folds called villi, which are finger like mucosal projections, about 1mm long.']
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Mucous cells produce mucus, which doesn't stain very darkly, so the mucous cells look almost clear on these images and on slides. Serous cells produce a watery secretion that contains a lot of proteins. Serous cells stain fairly dark. Each of the three glands has different proportions of these two cell types.
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Genital warts usually take the form of small bumps of roughly two to three centimeters in diameter and are sometimes described as resembling miniature cauliflowers. They typically cause no pain and minimal discomfort, are red or skin-colored in appearance, and can be either soft or hard to touch.
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The villi. The villi (one is called a villus) are tiny, finger-shaped structures that increase the surface area. They have several important features: ... internal structure called a lacteal - transports fatty acids and glycerol away from the small intestine in the lymph.
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Pulmonary acinus. ... Pulmonary acinus is commonly defined as the portion of lung distal to a terminal bronchiole and supplied by a ﬁrst-order respiratory bronchiole or bronchioles 1. Each secondary pulmonary lobule usually contains 3-12 acini, and adjacent acini are separated by incomplete intralobular septa.
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Epidermoid and pilar cysts are smooth round lumps which you can see and feel just beneath the skin surface. They are very common. Often they are small, like a pea, but sometimes they slowly get bigger over many months to become a few centimetres in diameter.
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Clavicle Bone Marking: Conoid tubercle (tuberculum conoide-um) is a bump on the inferior surface of the bone, near the acromial end. It is an attachment point for the conoid ligament. The conoid ligament is a part of the coracoclavicular ligament, which attaches the clavicle to the coracoid process of the scapula.
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Milia are small, bump-like cysts found under the skin. They are usually 1 to 2 millimeters (mm) in size. They form when skin flakes or keratin, a protein, become trapped under the skin. Milia most often appear on the face, commonly around the eyelids and cheeks, though they can occur anywhere.