The diagram illustrates sensory receptors in the skin. What structure does "A" represent?
A) Meissner corpuscles
B) Free nerve endings
C) Ruffini end organ
D) Pacinian corpuscle
E) Merkel disks

Sensory Receptors

Specialized cells or structures in organisms that respond to external stimuli and send signals to the nervous system.

Meissner Corpuscles

Specialized nerve endings in the skin that are sensitive to touch and vibration, especially in hairless areas.

Merkel Disks

A type of mechanoreceptor found in the skin, which responds to light touch.