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Having its own blood supply, Meckel's diverticulum is susceptible to obstruction or infection. Meckel's diverticulum is located in the distal ileum, usually within 60–100 cm (2 feet) of the ileocecal valve. This blind segment or small pouch is about 3–6 cm (2 inch) long and may have a greater lumen diameter than that of the ileum. [20]
This arch divides into a maxillary process and a mandibular process, giving rise to structures including the bones of the lower two-thirds of the face and the jaw. The maxillary process becomes the maxilla (or upper jaw, although there are large differences among animals [11]), and palate while the mandibular process becomes the mandible or lower jaw.
A diverticulum of Kommerell is an outpouching (aneurysm) of the aorta where an aberrant right subclavian artery is located. [16] It is unusual nomenclature, in that focal dilatations of a blood vessel are properly referred to as aneurysms. Cardiac diverticulum is a very rare congenital malformation of the heart that is usually benign. [17]
The two can be differentiated as follows: a hamartoma is disorganized overgrowth of tissues in their normal location (e.g., Peutz–Jeghers polyps), while a choristoma is normal tissue growth in an abnormal location (e.g., osseous choristoma, [6] gastric tissue located in distal ileum in Meckel diverticulum).
Meckel's cartilage is a piece of cartilage from which the mandibles (lower jaws) of vertebrates evolved. Originally it was the lower of two cartilages which supported the first branchial arch in early fish. Then it grew longer and stronger, and acquired muscles capable of closing the developing jaw. [1]
Meckel's diverticulum – an out-pouching of the ileum, part of the small intestine, and found in approximately 2% of the population. Meckel's cartilage – A cartilaginous bar from which the mandible is formed. Described in 1820. A syndrome – Meckel syndrome – is also named after him. This condition was described in 1822.
The nutrient canal (foramen) is directed away from the growing end of bone. The growing ends of bones in upper limb are upper end of humerus and lower ends of radius and ulna. In lower limb, the lower end of femur and upper end of tibia are the growing ends. [1] The nutrient arteries along with nutrient veins pass through this canal.
Blood vessels play a huge role in virtually every medical condition. Cancer, for example, cannot progress unless the tumor causes angiogenesis (formation of new blood vessels) to supply the malignant cells' metabolic demand. [32] Atherosclerosis represents around 85% of all deaths from cardiovascular diseases due to the buildup of plaque. [33]