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Johann Meckel
Johann Friedrich Meckel (17 October 1781 – 31 October 1833), often referred to as Johann Friedrich Meckel, the Younger, was a German anatomist born in Halle. He worked as a professor of anatomy, pathology and zoology at the University of Halle, Germany. Life and research In 1802, he received his medical doctorate from the University of Halle, defending his doctoral thesis ''De cordis conditionibus abnormibus'' on 8 April 1802. At Halle he had as instructors, Kurt Sprengel (1766-1833) and Johann Christian Reil (1759-1813). After graduation, Meckel continued his education in Würzburg, Vienna and Paris. In Paris, he assisted zoologist Georges Cuvier (1769–1832) with systematic analysis of anatomical and zootomical specimens. In 1810 he finished translating Cuvier's five-volume ''Leçons d’anatomie Comparée'' from French into German. In 1808, he became a full professor of normal and pathological anatomy, surgery and obstetrics at the University of Halle, replacing Justus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halle, Saxony-Anhalt
Halle (Saale), or simply Halle (), is the second largest city of the German state of Saxony-Anhalt. It is the sixth-most populous city in the area of former East Germany after (East) Berlin, Leipzig, Dresden, Chemnitz and Magdeburg as well as the 31st-largest city of Germany. With around 226,000 inhabitants, it is less populous than the state capital, Magdeburg. With Leipzig, the largest city of Saxony, Halle forms the polycentric Leipzig-Halle conurbation. Leipzig/Halle International Airport lies between the two cities, in Schkeuditz. The Leipzig-Halle conurbation is at the heart of the larger Central German Metropolitan Region. Halle has been known by many names throughout its history. From the 15th to the 17th century: ''Hall in Sachsen''. From then until the beginning of the 20th century, the name Halle an der Saale was used, and still remains a more formal reference for the city. Additionally, from 1965 to 1995 the city was referred to as ''Halle/Saale''. Halle lies i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zootomy
Anatomy () is the branch of morphology concerned with the study of the internal structure of organisms and their parts. Anatomy is a branch of natural science that deals with the structural organization of living things. It is an old science, having its beginnings in prehistoric times. Anatomy is inherently tied to developmental biology, embryology, comparative anatomy, evolutionary biology, and phylogeny, as these are the processes by which anatomy is generated, both over immediate and long-term timescales. Anatomy and physiology, which study the structure and function of organisms and their parts respectively, make a natural pair of related disciplines, and are often studied together. Human anatomy is one of the essential basic sciences that are applied in medicine, and is often studied alongside physiology. Anatomy is a complex and dynamic field that is constantly evolving as discoveries are made. In recent years, there has been a significant increase in the use of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meckel's Cartilage
In humans, the cartilaginous bar of the mandibular arch is formed by what are known as Meckel's cartilages (right and left; also known as Meckelian cartilages), above which the incus and malleus are located. Meckel's cartilage arises from the first pharyngeal arch. The dorsal end of each cartilage is connected with the ear-capsule and is ossified to form the malleus; the ventral ends meet each other in the region of the mandibular symphysis, and are usually regarded as undergoing ossification to form that portion of the mandible which contains the incisor teeth. The intervening part of the cartilage disappears; the portion immediately adjacent to the malleus is replaced by fibrous membrane, which constitutes the sphenomandibular ligament, while from the connective tissue covering the remainder of the cartilage the greater part of the mandible is ossified. Johann Friedrich Meckel, the Younger discovered this cartilage in 1820. Evolution Meckel's cartilage is a piece of cartil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meckel's Diverticulum
A Meckel's diverticulum, a true congenital diverticulum, is a slight bulge in the small intestine present at birth and a vestigial remnant of the vitelline duct. It is the most common malformation of the Human gastrointestinal tract, gastrointestinal tract and is present in approximately 2% of the population, with males more frequently experiencing symptoms. Meckel's diverticulum was first explained by Fabricius Hildanus in the sixteenth century and later named after Johann Friedrich Meckel, who described the embryological origin of this type of diverticulum in 1809. Signs and symptoms The majority of people with a Meckel's diverticulum are asymptomatic. An asymptomatic Meckel's diverticulum is called a ''silent'' Meckel's diverticulum. If symptoms do occur, they typically appear before the age of two years. The most common presenting symptom is painless rectal bleeding such as melaena-like black offensive stools, followed by intestinal obstruction, volvulus and intussusception (m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
