👉 The chick fluid, also known as vitelline fluid, is a clear, watery substance found within the yolk sac of developing embryos, including chickens. It serves as a nutrient-rich medium for the early embryo, providing essential proteins, lipids, and other nutrients necessary for growth and development during the initial stages of embryogenesis. This fluid plays a crucial role in supporting the rapid cell division and differentiation that occur before the embryo attaches to the uterine wall. As development progresses, the chick fluid gradually transforms into the allantois and other structures that contribute to the embryo's survival and maturation.