SECRET INSIDE AN EGG
Eggs are laid by female animals of many different species, including birds , reptiles , amphibians , and fish , and have been eaten by humans for thousands of years. [ 1 ] Bird and reptile eggs consist of a protective eggshell , albumen ( egg white ), and vitellus ( egg yolk ), contained within various thin membranes. The most popular choice for egg consumption are chicken eggs. Other popular choices for egg consumption are duck , quail , roe , and caviar .