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There are several ways to classify the sense organs. One of them takes into account the location of the stimuli:
- Contact Receivers: inform about stimuli that affect the surface of the organism. This type includes the pressure receivers (tactile), thermal (thermoreceptors) and chemicals (chemoreceptors);
- Distance Receivers: inform about stimuli that develop without being in direct contact with the organism: light sound and some chemical (smell)
- Proprioceptors: those who provide information about the body itself (balance, posture, pain, etc.).
As for proprioceptors, it is important to remember the existence of such receptors in vertebrates and invertebrates.
Formed by scattered or localized cells, they receive specific pressure, thermal and chemical stimuliby sending them to higher centers of command of the organism.
THE language Many vertebrates have groups of cells, organized in taste (or taste) papillae, responsible for recognizing the taste of certain substances, evidently in aqueous solution.