El sistema auditiu de les serps
Escrit per Oriol
| Animals, plantes i éssers vius |
Les serps posseeixen unes estructures situades a cada costat del cap que els permet sentir. La pell i un teixit muscular a cada banda del cap, protegeixen un osset mòbil, anomenat columella, el qual fa petits moviments, com a resposta a les ones sonores, que són transferits a la còclea, en la qual es produeixen uns senyals elèctrics que es corresponen amb les ones de so que permet percebre el seu sistema auditiu, i transferides al cervell.
Per tant, al contrari del que es pensa habitualment, les serps tenen oïda per percebre sons transmesos a través de l'aire. El que passa, per una banda, és que no són visibles; i per altra banda, la seva oïda està preparada per percebre sons de baixa freqüència (entre 200-300 Hz, molt més reduït que el de l'home: 15-20000 Hz).
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