Snake - Skull, Sense Organs

Snake - Skull, Sense Organs: Snakes rely on several senses to inform them of their surroundings. The pits are sensitive to changes in temperature. The lidless eyes are covered by a transparent cap of epidermis. Sound reception is entirely by bone conduction within the skull. The skull is characterized by mobility, with hinge joints at several levels. Kidney wastes are excreted in a solid state as uric acid.
Snake, any of more than 3,400 species of reptiles distinguished by their limbless condition and greatly elongated body and tail. They are classified with lizards in the order Squamata and represent a lizard that, over the course of evolution, has undergone structural reduction, simplification, and loss as well as specialization.

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