Poultry Judging Practice Test

Which section of the reproductive tract is responsible for forming the eggshell?

1. Uterus

2. Infundibulum

3. Ovary

4. Vagina

The correct answer is: Uterus

The uterus, also known as the shell gland, is the section of the reproductive tract responsible for forming the eggshell in birds. This is a critical stage in the production of an egg, where the egg moves through the uterus after being fertilized. The lining of the uterus secretes calcium carbonate, which is the primary component of the eggshell, and it takes about 20 hours for the shell to form completely. This process provides the egg with protection and structure, allowing for the development of the embryo if fertilization has occurred. The infundibulum, ovary, and vagina serve different functions in the reproductive process. The infundibulum is responsible for capturing the ovulated egg and is where fertilization occurs if sperm are present. The ovary is where the oocytes, or egg cells, are produced. The vagina serves as a passageway for the egg as it exits the reproductive tract but does not contribute to the formation of the eggshell. Each part of the reproductive system plays a distinct role, but it is the uterus that is directly responsible for creating the eggshell.