Examlex
Explain how clouds can participate in both positive and negative feedback loops.
Melanin
A pigment that gives color to skin, hair, and eyes, and protects against UV radiation.
Vascularized
Having blood vessels; supplied with or containing blood vessels.
Orbicularis Oris
A circular muscle surrounding the mouth, involved in controlling movements of the mouth and lips.
Levator Palpebrae Superioris
A muscle in the eyelid responsible for raising the upper eyelid.
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