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www.proteinatlas.org/humanproteome/cell/mitochondria

The mitochondria are continuously undergoing fission and fusion of individual mitochondrion in response to the cell's needs. Fusion of mitochondria allows for communication between individual mitochondrion, and possibly enables exchange of both mtDNA and its gene products.

en.wikipedia.org/wiki/Human_mitochondrial_genetics

Human mitochondrial genetics is the study of the genetics of human mitochondrial DNA (the DNA contained in human mitochondria).The human mitochondrial genome is the entirety of hereditary information contained in human mitochondria. Mitochondria are small structures in cells that generate energy for the cell to use, and are hence referred to as the "powerhouses" of the cell.

www.thoughtco.com/mitochondria-defined-373367

Mitochondria have a distinctive oblong or oval shape and are bounded by a double membrane. The inner membrane is folded creating structures known as cristae.. Mitochondria are found in both animal and plant cells.They are found in all body cell types, except for mature red blood cells.The number of mitochondria within a cell varies depending on the type and function of the cell.

www.britannica.com/science/mitochondrion

Mitochondrion, membrane-bound organelle found in the cytoplasm of almost all eukaryotic cells (cells with clearly defined nuclei), the primary function of which is to generate large quantities of energy in the form of adenosine triphosphate (ATP). Mitochondria are typically round to oval in shape and range in size from 0.5 to 10 μm.In addition to producing energy, mitochondria store calcium ...

education.seattlepi.com/mitochondria-humans-4097.html

Mitochondria are like little power plants inside cells. They take in nutrients and break them down to create energy that cells can use. This process is called "cellular respiration." Tissues in the human body that need a lot of energy, such as muscles, have many more mitochondria than other tissue types, such ...

sciencing.com/cells-mitochondrion-9067.html

The mitochondrion, an organelle that helps produce energy for the cell, is only found in eukaryotes, organisms with relatively large, complex cells. Many cells don't have one. Cells with mitochondria contrast with prokaryotes, which lack set, membrane-bound organelles, such as mitochondria.

www.ncbi.nlm.nih.gov/books/NBK9896

Mitochondria contain their own genetic system, which is separate and distinct from the nuclear genome of the cell. As reviewed in Chapter 1, mitochondria are thought to have evolved from bacteria that developed a symbiotic relationship in which they lived within larger cells (endosymbiosis).

micro.magnet.fsu.edu/cells/mitochondria/mitochondria.html

Mitochondria. Mitochondria are rod-shaped organelles that can be considered the power generators of the cell, converting oxygen and nutrients into adenosine triphosphate (ATP).ATP is the chemical energy "currency" of the cell that powers the cell's metabolic activities.

bscb.org/learning-resources/softcell-e-learning/mitochondrion-much-more-than...

Mitochondrion (plur: mitochondria) – energy converter, determinator, generator (of reactive oxygen chemicals), enhancer, provider of genetic history and, controversially, an aid to boost the success rate in infertility treatment. Mitochondria are organelles that are virtually cells within a cell.

en.wikipedia.org/wiki/Mitochondrion

Mitochondria vary in number and location according to cell type. A single mitochondrion is often found in unicellular organisms. Conversely, the chondriome size of human liver cells is large, with about 1000–2000 mitochondria per cell, making up 1/5 of the cell volume.