A hollow, sac-like outpouching of the dorsal wall of the middle part of the cloaca (urodeum); like the thymus it produces lymphocytes and is important in immune responses; it regresses upon reaching maturity.
A substance that slows or stops bacterial reproduction and at the same time redu...
Duck eggs containing embryos after 16–18 days of incubation and then boiled for ...
Elements of the feather vane arising on both sides of the rachis.
Parts of the feather vane growing on both sides of the barbs; anterior (hooked) ...
The unfeathered part of the shaft of a feather between the superior and inferior...
Metabolism under basal conditions: thermoneutral environment, post‑absorptive st...