Image of Duodenal bulb

Duodenal bulb

Duodenal bulb Definition It is the part of the duodenum that is closest to the stomach. Duodenal bulb Appearance This duodenal structure is about 5 cms long. It is round in shape and has a smoother surface than the other parts of the duodenum that comprise of villi (tiny hair-like mucosal projections), as well as […]

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Image of Eponychium

Eponychium

Eponychium Definition It refers to a tiny epithelium band that stretches onto the nail base from the posterior section of the nail. It is actually the terminal point of the proximal fold that rolls back to cast off an epidermal skin layer over a nail plate that has been formed freshly. Eponychium Synonyms It is […]

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Picture of Middle temporal gyrus

Middle temporal gyrus

Middle temporal gyrus Definition It refers to a gyrus, meaning an elevation or a convex fold, on the temporal lobe in the surface of the brain. This structure should not be confused with medial temporal lobe. It is abbreviated as MTG or even GTm. GTm refers to the fact that it is also often referred […]

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Picture of Zona reticularis

Zona reticularis

Zona reticularis Definition It is the innermost of the three tissue layers of the cortex in the adrenal gland. It comprises of cylindrical masses of epithelial cells that are arranged in an irregular, netlike fashion. The other two adrenal cortex layers, lying above this layer, are Zona glomerulosa and Zona fasciculata. Zona reticularis Location It […]

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Image of Orifice of ureter

Orifice of ureter

Orifice of ureter Definition It refers to any of the openings that allow passage of urine to the bladder from the ureter. It is known by various other names, such as: Mercier’s bar Orifice of ureter Ureterovesical orifice Ureteric ostium Ureteric orifice Ostium ureteris (Latin) Ostium de l’uretère (French) Orifice of ureter Location It is […]

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Picture of Supraclavicular Lymph Nodes

Supraclavicular Lymph Nodes

Supraclavicular Lymph Nodes Definition These are lymph nodes located in a position superior to the clavicle. Supraclavicular Lymph Nodes Location There are two types of these nodes. One of these is located on the left side and another on the right side. Supraclavicular Lymph Nodes Function These drain the lymphatic fluid from the head and […]

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Prostatic urethra

Prostatic urethra Definition It is the widest and most expandable section of the urethra canal. It is approximately 3 cm in length. It is one of the three segments of the male urethra. Prostatic urethra Location It extends through the prostate gland almost vertically, from the base to the apex. It lies near the anterior […]

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Picture of Pectinate muscle

Pectinate muscles

Pectinate muscle Definition It refers to any of the special intracardiac muscles or prominent atrial myocardium ridges. This physical structure gets its name from the fact that the muscular fibers located in it are arranged like the bristles of a comb. It is also known by other names like Musculus pectinatus and Músculo pectinate. (more…)

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Image of Central sulcus

Central sulcus

Central sulcus Definition It is a furrow or deep groove in the brain. It is said to have a ‘map’ of the body on each side that matches the other side. It is also known as “Fissure of Rolando” or “Rolandic Fissure,” after the noted Italian anatomist Luigi Rolando. Central sulcus Location It is located […]

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