Home»Animal Refresher»Location of Air Cell in Chicken Egg Topics: Animal Refresher, Poultry Science Location of Air Cell in Chicken Egg Question Question The air cell of a chicken egg is situated at the: Select an answer Narrow end of egg Broad end of egg Middle of the egg On the side of the egg depending on position at laying Check Answer Location of Air Cell in Chicken EggThe air cell of a chicken egg is situated at the: OptionsNarrow end of eggBroad end of egg ✓Middle of the eggOn the side of the egg depending on position at layingCorrect Answer: BExplanation in EnglishCorrect Answer: Broad end of egg The air cell is the space between the inner and outer shell membranes and is always located at the broad end of the chicken egg. Why the Air Cell Is at the Broad End The broad end contains the maximum number of pores for gaseous exchange. After the egg is laid and cools down, the contents contract slightly, creating the air cell at the broad end. The embryo's head develops towards the broad end during incubation so it can use the air cell oxygen for the first breath before pipping. Air Cell Size as a Quality Indicator Freshly laid egg: Air cell depth = 1–3 mm (very small). As the egg ages, the air cell enlarges due to evaporation of water and loss of CO₂. A large air cell = old egg. Air cell depth measured in specific gravity or brine flotation gives freshness index. Why Other Options Are Wrong Narrow end → where the pointed end is; no air cell here. Middle → not anatomically possible; air cell is always at broad end. Side of egg → air cell location is fixed, not variable.
Location of Air Cell in Chicken EggThe air cell of a chicken egg is situated at the: OptionsNarrow end of eggBroad end of egg ✓Middle of the eggOn the side of the egg depending on position at layingCorrect Answer: BExplanation in EnglishCorrect Answer: Broad end of egg The air cell is the space between the inner and outer shell membranes and is always located at the broad end of the chicken egg. Why the Air Cell Is at the Broad End The broad end contains the maximum number of pores for gaseous exchange. After the egg is laid and cools down, the contents contract slightly, creating the air cell at the broad end. The embryo's head develops towards the broad end during incubation so it can use the air cell oxygen for the first breath before pipping. Air Cell Size as a Quality Indicator Freshly laid egg: Air cell depth = 1–3 mm (very small). As the egg ages, the air cell enlarges due to evaporation of water and loss of CO₂. A large air cell = old egg. Air cell depth measured in specific gravity or brine flotation gives freshness index. Why Other Options Are Wrong Narrow end → where the pointed end is; no air cell here. Middle → not anatomically possible; air cell is always at broad end. Side of egg → air cell location is fixed, not variable.
