The shell protects the egg from bacteria and is produced in the oviduct. The egg white, or albumen, makes up most of the liquid content at 67% and surrounds the yolk. Membranes under the shell and around the yolk help contain and position the yolk in the center of the egg white.
6. The shell is the egg‘s first
line of defense against
bacterial contamination.
The shell is produced by the
shell gland (uterus) of the
oviduct, and has an outer
coating, the bloom or
cuticle.