Etymology of sinus
WebMar 28, 2024 · Structure. The sinuatrial node is found in the posterolateral wall of the sinus of venae cavae in the right atrium (hence ‘sinu-’ + atrial) close to the junction of the superior vena cava with the right atrium, deep to the crista terminalis.It is made up of specialized cardiomyocytes, also known as nodal cardiac muscle cells or ‘pacemaker’ cells which … Sinus is Latin for "bay", "pocket", "curve", or "bosom". In anatomy, the term is used in various contexts. The word "sinusitis" is used to indicate that one or more of the membrane linings found in the sinus cavities has become inflamed or infected. It is however distinct from a fistula, which is a tract connecting two epithelial surfaces. If left untreated, infections occurring in the sinus cavities ca…
Etymology of sinus
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WebThe word sine originally came from the latin sinus, meaning "bay" or "inlet". However, it had a long path to get there. ... The origin of secant can be traced to latin as well. It comes … WebAug 10, 2024 · Normal sinus rhythm (NSR) is the rhythm that originates from the sinus node and describes the characteristic rhythm of the healthy human heart. The rate in NSR is generally regular but will vary depending on autonomic inputs into the sinus node. When there is irregularity in the sinus rate, it is termed "sinus arrhythmia."
WebMay 1, 2001 · The maxillary sinus is the largest of the sinuses and most relevant to dentists given its proximity to the posterior maxillary teeth (Fig. 1). Each cavity is the shape of a three-sided pyramid, with the apex toward the zygomatic process. The orbital floor forms the roof, the alveolar process forms the inferior boundary and the lateral nasal ... WebNov 9, 2024 · carotid. (adj.) 1540s, "pertaining to the two great arteries of the neck," from Greek karotidēs "great arteries of the neck," plural of karotis, from karoun "plunge into sleep or stupor," because compression of these arteries was believed to cause unconsciousness (Galen). But if this is folk etymology, the Greek word could be from kara "head ...
WebSinusoid definition, a curve described by the equation y = a sin x, the ordinate being proportional to the sine of the abscissa. See more. WebJan 8, 2024 · Gross anatomy. Described as a pyramid, the maxillary sinuses have a base on the lateral border of the nose, with the apex pointing towards the zygomatic process of the maxilla. The floor is formed by the alveolar process of the maxilla. The roof is the orbital floor. The posterior wall forms the anterior border of the pterygopalatine fossa.
While the early study of trigonometry can be traced to antiquity, the trigonometric functions as they are in use today were developed in the medieval period. The chord function was discovered by Hipparchus of Nicaea (180–125 BCE) and Ptolemy of Roman Egypt (90–165 CE). See in particular Ptolemy's table of chords. The sine and cosine functions can be traced to the jyā and koṭi-jyā functions us…
WebMar 29, 2024 · 1.Introduction. Atypical origin of the coronary arteries is a rare condition, with a reported incidence of 1.3%. The atypical origin of the left coronary artery from the right sinus with interarterial course has a prevalence of 0.17%, and a risk of death of 0.24/100,000 per person-year [1].However, abnormal coronary arteries are the second … most crimes committedWebOct 5, 2016 · $\begingroup$ Ernest Klein, "Klein's Comprehensive Etymological Dictionary of the English Language", Elvevier 1971, which is reputed to be particular thorough for … miniature halloween decorationsWebNov 19, 2024 · early 15c., in anatomy, "hollow curve or cavity in the body" (Chauliac), from Medieval Latin sinus, from Latin sinus "bend, fold, curve, a bent surface; a bay, bight, gulf; a fold in land;" also "fold of the toga about the breast," hence "bosom," and figuratively "love, affection, intimacy; interior, inmost part;" a word of unknown origin. De Vaan writes that … most crimes in the worldWebSinus rhythm is the primary physiologic mechanism of the heartbeat. You diagnose it by finding P waves with a polarity predictable from simple vector principles (see Chapter 5 ). … miniature halloween treesWebMar 16, 2014 · Sacrococcygeal pilonidal sinus is a common disorder among young adults. Observed most commonly in people aged 15-30 years, with a 3:1 male-to-female ratio, it occurs after puberty, when sex hormones are known to affect the pilosebaceous gland and change healthy body hair growth. The onset of pilonidal disease is rare in people older … most crime ridden city in washington dcWebThe urogenital sinus is a part of the human body only present in the development of the urinary and reproductive organs.It is the ventral part of the cloaca, formed after the cloaca separates from the anal canal during … miniature hand cream bulkWebJul 30, 2024 · Sinus arrhythmia is an irregularity in the heart rhythm that originates at the sinus node. Sinus tachycardia: a faster heart rate, beating faster than 100 beats per minute (bpm) Sinus bradycardia ... miniature halogen lamp bases chart