What do sternum, breastbone, and keel refer to in poultry?

The correct answer encompasses the various roles that the sternum, breastbone, and keel play in poultry anatomy and their importance in poultry judging.

The sternum, often referred to as the breastbone or keel, serves as a significant structural element that provides an attachment point for the breast muscles, which are crucial for the bird's ability to fly and for muscle development in meat chickens. The strong attachment facilitates the muscle's ability to function effectively, which is important for growth and meat yield.

Furthermore, the sternum supports the body weight of the chicken, thereby contributing to the overall skeletal structure and integrity. An adequately formed keel bone is essential for maintaining balance and posture in the bird.

Additionally, any deformities related to the sternum or keel can indeed negatively impact the carcass market value. Defects such as deformity or malformation can indicate underlying health issues or poor development, which can reduce the quality of the meat and its desirability in the market.

This comprehensive understanding of the sternum, breastbone, and keel reinforces their critical roles in both the physiological function of the bird and the economic aspects of poultry production.