Final Answer:
The cloaca is the organ in male poultry, and the cloaca wall of the cloaca that deposits sperm into the hen's reproductive tract.
Step-by-step explanation:
In male poultry, the reproductive and excretory functions are combined in a single opening called the cloaca. The cloaca serves as the common chamber for the passage of feces, urine, and reproductive materials. During copulation, the male poultry uses its cloaca to transfer sperm to the female. The wall of the cloaca has specialized structures that aid in the delivery of sperm into the hen's reproductive tract.
The sperm then travels through the oviduct, where fertilization takes place before the formation of the eggshell. This unique reproductive system in poultry is different from mammals, where distinct organs are involved in reproduction.