Muscle Tear Definition. Pulled muscles, tearing of the muscle fiber and muscle strains are common injuries, usually occurring during a sporting activity. These three names designate one and the same clinical condition, but reflect different degrees of straining muscles.uscle Tear Definition. Pulled muscles, tearing of the muscle fiber and muscle strains are common injuries, usually occurring during a sporting activity. These three names designate one and the same clinical condition, but reflect different degrees of straining muscles.
Noun. 1. egg yolk-the yellow spherical part of an egg that is surrounded by the albumen. yolk. fixings, ingredient-food that is a component of a mixture in cooking; the recipe lists all the fixings for a salad. eggs, egg-oval reproductive body of a fowl (especially a hen) used as food.
Eggs may be classified according to the relative amount of yolk: microlecithal egg; mesolecithal egg; macrolecithal egg; Inside the egg, the zygote forms a blastodisk, which develops into an embryo, and finally into a fetus. The developing young uses the yolk for its sustenance. This kind of reproduction (i.e. laying eggs) is called oviparity in contrast to viviparity wherein the young develops inside the mother's womb, derives nourishment from the mother, and is born alive.