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Netter's Essential Histology is a textbook/atlas of human histology authored by William K. Ovalle [1] [2] and Patrick C. Nahirney. [ 3 ] [ 4 ] Drawings by medical illustrator, Frank H. Netter , with contributing artwork by James A. Perkins, Joe Chovan, John A. Craig, and Carlos A.G. Machado, are in the book. [ 5 ]
Frank Henry Netter (25 April 1906 – 17 September 1991) was an American surgeon and medical illustrator.The first edition of his Atlas of Human Anatomy — his "personal Sistine Chapel" [1] — was published in 1989; he was a fellow of the New York Academy of Medicine where he was first published in 1957.
The unpaired umbilical vein carries oxygen and nutrient rich blood derived from fetal-maternal blood exchange at the chorionic villi.More than two-thirds of fetal hepatic circulation is via the main portal vein, while the remainder is shunted from the left portal vein via the ductus venosus to the inferior vena cava, eventually being delivered to the fetal right atrium.
Gray's Anatomy for Students is an anatomy textbook inspired by the famous Gray's Anatomy (Grey's Anatomy) and aimed primarily at medical students. The textbook has been praised for its innovative illustration style, which emphasizes clarity and a conceptual approach to learning. [ 1 ]
Older texts have asserted the existence of a urogenital diaphragm, also called the triangular ligament, which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenital diaphragm (perineal membrane) and superior fascia of the urogenital diaphragm.
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Gross anatomy is studied using both invasive and noninvasive methods with the goal of obtaining information about the macroscopic structure and organisation of organs and organ systems. Among the most common methods of study is dissection , in which the corpse of an animal or a human cadaver is surgically opened and its organs studied.
Due to its anatomy, the pinna largely eliminates a small segment of the frequency spectrum; this band is called the pinna notch. The pinna works differently for low and high frequency sounds. For low frequencies, it behaves similarly to a reflector dish, directing sounds toward the ear canal.