Some eggs are laid by female animals of many different species, including birds, reptiles, amphibians, mammals, and fish, and have been eaten by humans for thousands of years.
Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives.
A fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits.
In biology, a species is one of the basic units of biological classification and a taxonomic rank.
Egg Yolk as Fry Food? by Aquarimax
Bird and reptile eggs consist of a protective eggshell, albumen, and vitellus, contained within various thin membranes.
Birds are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
An eggshell is the outer covering of a hard-shelled egg and of some forms of eggs with soft outer coats.
Recipe of the Day: Cloud Eggs | Food Network by Food Network
The most commonly consumed eggs are chicken eggs.
The chicken is a type of domesticated fowl, a subspecies of the red junglefowl.
Other poultry eggs including those of duck and quail also are eaten.
Duck is the common name for a large number of species in the waterfowl family Anatidae, which also includes swans and geese.
Quail is a collective name for several genera of mid-sized birds generally placed in the order Galliformes.
Fish eggs are called roe and caviar.
Roe or hard roe is the fully ripe internal egg masses in the ovaries, or the released external egg masses of fish and certain marine animals, such as shrimp, scallop and sea urchins.
An egg is the organic vessel containing the zygote in which an animal embryo develops until it can survive on its own; at which point the animal hatches.
Caviar is a delicacy consisting of salt-cured roe of the Acipenseridae family.
Egg yolks and whole eggs store significant amounts of protein and choline, and are widely used in cookery.
Among animals which produce one, the yolk is the nutrient-bearing portion of the egg whose primary function is to supply food for the development of the embryo.
Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues.
Choline is a water-soluble vitamin-like essential nutrient.
Due to their protein content, the United States Department of Agriculture categorizes eggs as Meats within the Food Guide Pyramid.
The United States Department of Agriculture, also known as the Agriculture Department, is the U.S. federal executive department responsible for developing and executing federal laws related to farming, forestry, and food.
The United States of America, commonly referred to as the United States or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
A food pyramid or diet pyramid is a triangular diagram representing the optimal number of servings to be eaten each day from each of the basic food groups.
Despite the nutritional value of eggs, there are some potential health issues arising from cholesterol content, salmonella contamination, and allergy to egg proteins.
Cholesterol, from the Ancient Greek chole- and stereos followed by the chemical suffix -ol for an alcohol, is an organic molecule.
Chickens and other egg-laying creatures are kept widely throughout the world and mass production of chicken eggs is a global industry.
Mass production, also known as flow production or continuous production, is the production of large amounts of standardized products, including and especially on assembly lines.
In 2009, an estimated 62.1 million metric tons of eggs were produced worldwide from a total laying flock of approximately 6.4 billion hens.
The tonne, commonly referred to as the metric ton in the United States, is a non-SI metric unit of mass equal to 1,000 kilograms; or one megagram ; it is equivalent to approximately 2,204.6 pounds, 1.102 short tons or 0.984 long tons.
There are issues of regional variation in demand and expectation, as well as current debates concerning methods of mass production.
In 2012, the European Union banned battery husbandry of chickens.
The European Union is a politico-economic union of 28 member states that are located primarily in Europe.