The same body opening {cloaca}| can be for anus and reproductive tract.
Reptiles have two-layered nerve sheets {paleocortex}| connected to several ganglia, allowing more complex information processing and distribution. Paleocortex cerebrum covers forebrain and has distinct input layer and output layer.
Geckoes tilt toe hairs 30 degrees to let go while walking {toe peeling, hair}|.
Reptiles have one eye {median eye}| to detect infrared light. Later, median eye evolved to become pineal gland.
In reptiles, skull front-middle eye {parietal eye}| {third eye} detects sunlight level, regulates daily activities, and regulates seasonal responses to light and temperature. Parietal-eye light level affects puberty, sexual activity, hibernation, and aestivation.
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Date Modified: 2022.0225