Useless fact
What is the small pocket on a cat's ear called?
The small pouch or pocket on the outer edge of a cat's ear is anatomically known as Henry's pocket.
The small, open pouch located on the lower, outer edge of a cat's ear is anatomically referred to as the cutaneous marginal pouch, but it is widely and colloquially known as Henry's pocket. While the feature is most noticeable on cats, it is also present on some dogs, weasels, and bats. Despite being a well-documented anatomical structure in veterinary science, its exact evolutionary purpose remains a subject of debate among biologists. Some experts hypothesize that the pocket helps cats detect high-pitched sounds by acting as a barrier or a funnel that directs sound waves more effectively into the ear canal. Other scientists suggest that the fold simply increases the flexibility of the ears, allowing cats to rotate them more easily to pinpoint the direction of noises without straining the skin. Regardless of its precise function, the pocket is a completely normal part of feline anatomy and requires no special cleaning unless it becomes irritated or infested with parasites, which can occasionally happen due to its dark and sheltered structure.
Why this is true — The term 'Henry's pocket' (anatomically 'cutaneous marginal pouch') is a standard veterinary term for this feature on feline ears, documented in veterinary anatomy literature.
Sources
- Henry's pocket Wikipedia
- Cutaneous marginal pouch Vetlexicon