Pronunciation: [ˈə͡ʊvɪsˌak] (IPA) 
The spelling of "Ovisac" may seem a bit confusing at first, but it can be broken down phonetically. The word is pronounced as "oh-vuh-sak" and is made up of two parts: "ovi," meaning sheep, and "sac," meaning a pouch or sac. The IPA transcription of this word is /ˈoʊvəsæk/. Despite its unusual spelling, "Ovisac" is a common term used in biology to describe the fluid-filled sac that surrounds the developing eggs in female sheep.
An ovisac is a specialized structure found in some animals, particularly in insects and female birds, that serves as a protective covering or container for eggs or young offspring. Derived from the Latin word "ovum" meaning egg, and "sac" meaning pouch or bag, the term accurately describes this anatomical feature.
In insects, such as aphids, the ovisac is formed by a secretion of waxy material from the female's body. This structure encloses the eggs, keeping them safe from external threats, predators, and harsh environmental conditions. Once the eggs hatch, the offspring emerge from the ovisac and begin their independent lives.
Similarly, in certain bird species, the ovisac is an integral part of the reproductive system in females. It refers to a glandular structure within the ovary that stores or encloses the developing eggs before their release during ovulation. This protective sac ensures proper nurturing and development of the eggs before they are laid or fertilized.
Ovisacs can vary in size, shape, and composition, depending on the species. These structures play a crucial role in protecting and maintaining the reproductive potential of the animals. The term "ovisac" is widely used in scientific research, veterinary medicine, and biological studies to describe these significant anatomical features in various organisms.
Graafian follicle.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The egg-bag or membrane which connects in one mass the eggs, spawn, or roe of crustaceans and many insects; the cavity in the ovary containing the ovum.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The term "ovisac" originated from two Latin words: "ovi", which means "egg", and "sac", which means "bag" or "sack". It combines these two elements to describe a sac or membrane that contains eggs, particularly in insects or other small organisms.
