
Concept explainers
To define:
The term cloaca, nictitating membrane, ectotherm, and tympanic membrane.

Explanation of Solution
Cloaca is a chamber like structure in which intestinal, urinary and genital tracts. Present in amphibians, reptiles, birds and some elasmobranchs.
Nictitating membrane is transparent eyelid or partially opaque membrane that helps in keeping the eye moist and helps in opening water in eye.
Ectotherm are the animals that do not have an internal regulation of temperature and their body temperature vary according to environment.
Tympanic membrane or eardrum is the thin layer that receives sound vibrations from the outer ear and transmit it to the auditory ossicles.
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