Ears
Similar to dogs, cats have sensitive ears that allow them to move each ear independently of one another. Because of this mobility, a cat can move its body in one direction and point its ears in another direction. The rostral, caudal, dorsal, and ventral auricular muscle groups of each ear comprise fifteen muscles that are responsible for this ability. Most cats have straight ears pointing upward. Unlike with dogs, flap-eared breeds are extremely rare (Scottish Folds have one such exceptional mutation). When angry or frightened, a cat will lay back its ears to accompany the growling or hissing sounds it makes. Cats also turn their ears back when they are playing or to listen to a sound coming from behind them. The fold of skin forming a pouch on the lower posterior part of the ear, known as Henrys pocket, is usually prominent in a cats ear. Its function is unknown, though it may assist in filtering sounds. Nose
Cats are highly territorial, and secretion of odors plays a major role in cat communication. The nose helps cats to identify territories, other cats and mates, to locate food, and has various other uses. A cats sense of smell is believed to be about fourteen times more sensitive than that of humans. The rhinarium (the leathery part of the nose we see) is quite tough, to allow it to absorb rather rough treatment sometimes. The color varies according to the genotype (genetic makeup) of the cat.
Heat tolerance
Cats are able to tolerate quite high temperatures: Humans generally start to feel uncomfortable when their skin temperature passes about 38 °C (100 °F), but cats show no discomfort until their skin reaches around 52 °C (126 °F),: 46  and can tolerate temperatures of up to 56 °C (133 °F) if they have access to water. Temperature regulation
Cats conserve heat by reducing the flow of blood to their skin and lose heat by evaporation through their mouths. Cats have minimal ability to sweat, with glands located primarily in their paw pads, and pant for heat relief only at very high temperatures (but may also pant when stressed). A cats body temperature does not vary throughout the day; this is part of cats general lack of circadian rhythms and may reflect their tendency to be active both during the day and at night. : 1

Water conservation
Cats feces are comparatively dry and their urine is highly concentrated, both of which are adaptations to allow cats to retain as much water as possible. Their kidneys are so efficient, they can survive on a diet consisting only of meat, with no additional water. They can tolerate high levels of salt only in combination with freshwater to prevent dehydration. Ability to swim
While domestic cats are able to swim, they are generally reluctant to enter water as it quickly leads to exhaustion.