Hematopoiesis is also in American English; Sometimes H (the hemopoiesis ) is the formation of blood from the cellular components. All cellular blood components are derived from hematopoietic stem cells. [2] In a healthy adult individual, approximately 10 11 -10 12 new blood cells are produced daily to maintain steady-state levels in the peripheral circulation. …
Let’s know about Extramedullary hematopoiesis. Extramedullary hematopoiesis (EMH or sometimes EH) refers to hematopoiesis that occurs outside the marrow ( bone marrow ). It can be physiological or pathological. Physiological EMH occurs during embryonic and fetal development; The main sites of fetal hematopoiesis during this time are the liver and spleen. Pathological EMH can occur …
Hematopoietic stem cells ( HSCs ) are stem cells that give rise to other blood cells. This process is called hematopoiesis. [1] In vertebrates, already definitive HSCs arise from the ventral endothelial wall of the embryonic aorta within the (midgestational) aorta-gonadal-mesonephros region, through a process known as endothelial-to-hematopoietic transition. [2] [3] In adults, hematopoiesis occurs …
What is the Thermoregulation physiology: Let us know about Thermoregulation physiology. Temperature is the process that allows organisms to regulate their body temperature, modulating heat loss and gain. The animal kingdom has different mechanisms of temperature regulation, both physical and moral. (Thermoregulation physiology) Regulating body temperature is a basic activity for any living being, since the parameter …
What is the Thermophiles: The thermophiles are a subtype of extremophiles that tolerate high temperatures, between 50 °C and 75 °C, either because these temperature values are maintained in these extreme environments, or because they are frequently reached. Thermophilic organisms are usually bacteria or archaea, however, there are metazoans (eukaryotic organisms that are heterotrophic and tissue), …
Let us know about the Principles of cell evolution. Principles of cell evolution are explanations that seek to understand when and how cells emerged. Usually they refer to eukaryotic cells, that is, they have a nucleus that is separated by a cellular membrane where they contain the genetic material. Unlike prokaryotic cells, which appeared simple and appeared …
what is the Transformation of Lamarck Principle: Let us know about the Transformation of Lamarck Principle. Lamarck’s theory of transformationalism is a set of principles and knowledge formulated by Jean-Baptiste Pierre Antoine de Monet Chevalier de Lamarck in 1802, to explain the evolution of life. Lamarck was a French naturalist who lived between 1744 and 1829. His …
Ureaplasma is a genus of bacteria that does not have a cell wall and is characterized by hydrolyzing urea and growing in acidic media. They are known to infect humans and other mammals, including cattle, dogs, cats, sheep, goats, raccoons, monkeys, pigs and birds, including quail, domestic chickens and turkeys. In humans, ureaplasma has been isolated from …
Trypanosoma brucei is an external parasitic protozoan. Class Kinetoplastidae, family Trypanosomatidae belongs to the genus Trypanosoma . There are two subspecies that cause two different forms of African human trypanosomiasis or “sleeping sickness”. Trypanosoma brucei subsp. gambiense , causes the chronic form and 98% of cases are located in western and central sub-Saharan Africa. Trypanosoma brucei subsp. Rhodesis is the cause of the acute form present in …
Transcytosis It is the transport of material from one side of the extracellular space to the other. Although this phenomenon can occur in all types of cells – including osteoclasts and neurons – it is characteristic of epithelia and endothelia. During transcytosis, molecules are transported through endocytosis, mediated by some molecular receptor. The membranous vesicle migrates through the …