BIOL 202 Study Guide - Final Guide: Low Frequency, Internal Fertilization, Binocular Vision
12 Jan 2016
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Keratin production increased in outer layer of skin cells (impermeable protein that protects skin from abrasion or rigorous terrestrial environment) also protects from uv. Amphibian skin has glands to keep skin moist. Air is less dense than water, skeletal support, balance, and locomotion: Vertebral column modified to provide support and flexibility. Sternum is present to support forelimbs and protect internal organs. Behavioral strategies (nocturnal, warming by conduction, etc. ) Excretion of urea/uric acid to conserve water. Live in areas of high humidity, rehydrate by entering water. Reduce amount of body surface exposed to air. Tympanic membrane receives airborne vibrations and transmits them to the middle ear. Low frequency through front appendages and pectoral girdle through operculum. Nictitating membrane-third eyelid that acts to protect the eye and moisten the. Eye protection and corneal structure eye to maintain vision. Truly terrestrial animals tied to amniotic egg + internal fertilization.
