Special senses

Special senses are a group of senses that have specialized organs devoted to them. These senses include vision, hearing, balance, taste, and smell. The special sense organs may be quite complex in structure.

Etymology

The term "special senses" is derived from the Latin word "specialis", which means "particular". This term is used to differentiate these senses from the general senses like touch, temperature, pain, and body position, which do not have specialized organs.

Vision

Vision is the special sense of sight that is based on the transduction of light stimuli received on the retina. The retina is a part of the eye, which is the organ responsible for vision. The eye has several components including the cornea, iris, lens, and retina, each playing a crucial role in the process of vision.

Hearing

Hearing is the special sense that involves the ability to perceive sound by detecting vibrations. The organ responsible for hearing is the ear. The ear is divided into three parts: the outer ear, the middle ear, and the inner ear. Each part plays a role in the process of hearing.

Balance

Balance is the sense that allows an organism to sense body movement, direction, and acceleration, and to attain and maintain postural equilibrium and balance. The organ responsible for balance is also the ear, specifically the vestibular system located in the inner ear.

Taste

Taste is one of the two main "chemical" senses. The organ responsible for taste is the tongue. The tongue has many taste buds that detect different types of tastes: sweet, salty, sour, bitter, and umami.

Smell

Smell is the other "chemical" sense. The organ responsible for smell is the nose, specifically the olfactory epithelium located in the upper part of the nasal cavity.

Related Terms

• General senses
• Sensory system
• Sensory receptors
• Sensory neurons

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