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Selenium in biology. Selenocysteine is the main organic molecule involving selenium in humans. Selenium is an essential micronutrient for animals, though it is toxic in large doses. In plants, it sometimes occurs in toxic amounts as forage, e.g. locoweed. Selenium is a component of the amino acids selenocysteine and selenomethionine.
Selenium. Selenium is a chemical element; it has the symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form. It seldom occurs in this elemental state or as pure ore compounds in Earth's crust.
In the context of nutrition, a mineral is a chemical element. Some "minerals" are essential for life, but most are not. [ 1][ 2][ 3] Minerals are one of the four groups of essential nutrients; the others are vitamins, essential fatty acids, and essential amino acids. [ 4] The five major minerals in the human body are calcium, phosphorus ...
Messer agrees. While it's true that foods can impact our metabolic health, our bodies are “pretty resilient,” says Messer, and individual food choices don't usually create drastic hormonal ...
Yolk. The yolk of a chicken egg. Diagram of a fish egg; the yolk is the area marked 'C'. Among animals which produce eggs, the yolk ( / ˈjoʊk /; also known as the vitellus) is the nutrient -bearing portion of the egg whose primary function is to supply food for the development of the embryo. Some types of egg contain no yolk, for example ...
Eggs are also inexpensive—a huge plus considering how much nutritional value they provide. They're loaded with B vitamins (B5, B12, and B2, to be exact), selenium, calcium, zinc , and vitamin A ...
The bird egg is a fertilized gamete (or, in the case of some birds, such as chickens, possibly unfertilized) located on the yolk surface and surrounded by albumen, or egg white. The albumen in turn is surrounded by two shell membranes (inner and outer membranes) and then the eggshell. The chicken eggshell is 95 [citation needed] -97% [ 2 ...
In vitro fertilisation ( IVF) is a process of fertilisation where an egg is combined with sperm in vitro ("in glass"). The process involves monitoring and stimulating a woman's ovulatory process, removing an ovum or ova (egg or eggs) from their ovaries and letting a man's sperm fertilise them in a culture medium in a laboratory.