where is the mitochondria located in the human body
Mitochondrion Mitochondria (and related structures) are found in all eukaryotes (except one—the Oxymonad Monocercomonoides sp.).[2][62] Although commonly depicted as bean-like structures they form a highly dynamic network in the majority of cells where they constantly undergo fission and fusion. Mitochondria vary in number and location according to cell type. A single mitochondrion is often found in unicellular organisms. Conversely, numerous mitochondria are found in human liver cells, with about 1000–2000 mitochondria per cell, making up 1/5 of the cell volume.[13] The population of all the mitochondria of a given cell constitutes the chondriome. The mitochondrial content of otherwise similar cells can vary substantially in size and membrane potential,[63] with differences arising from sources including uneven partitioning at cell divisions, leading to extrinsic differences in ATP levels and downstream cellular processes.[64] The mitochondria can be found nestled between myofibrils of muscle or wrapped around the sperm flagellum.[13] Often, they form a complex 3D branching network inside the cell with the cytoskeleton. The association with the cytoskeleton determines mitochondrial shape, which can affect the function as well:[65] different structures of the mitochondrial network may afford the population a variety of physical, chemical, and signalling advantages or disadvantages.[66] Mitochondria in cells are always distributed along microtubules and the distribution of these organelles is also correlated with the endoplasmic reticulum.[67] Recent evidence suggests that vimentin, one of the components of the cytoskeleton, is also critical to the association with the cytoskeleton.[68]
Nuclear membrane Exactly how the nuclear membrane reforms during telophase of mitosis is debated. Two theories exist[7]â€”
Small intestine Food from the stomach is allowed into the duodenum through the pylorus by a muscle called the pyloric sphincter.
Implantation (human embryo) On the endometrium, the apposition is usually made where there is a small crypt in it, perhaps because it increases the area of contact with the rather spherical blastocyst.
Abdominal examination On light palpation, the examiner tests for any palpable mass, rigidity, or pain.
Eye injuries during general anaesthesia Methods to prevent intraoperative corneal injuries include