Thyroid 101. Located above the Adam's apple, your thyroid produces thyroid hormone (TH), which regulates, among other things, your body's temperature, metabolism, and heartbeat. Things can start to go wrong when your thyroid is under- or over-active. If it's sluggish, it produces too little TH; amped-up and it produces too much.
yes but what is it to you. As with most fish, perch fish do not have eyelids. They are, however, covered by a layer of transparent integument or coating to keep the eye protected.no a perch fish does not have eyelids but they have viginas.ome do but alot of them don't. Some like the leopard geckos, fat tail geckos, cat geckos, and more do have eyelids. Crested geckos, tokay geckos, banana geckos, and more do n â¦ ot have eyelids. The ones that don't have eyelids lick their eyes to keep them moist and clean.
Horseshoe crabs have two primary compound eyes and seven secondary simple eyes. Two of the secondary eyes are on the underside. Most arthropods have at least one of two types of eye: lateral compound eyes, and smaller median ocelli, which are simple eyes.When both are present, the two eye types are used in concert because each has its own advantage.hile most crustacean and insect larvae possess only simple median eyes, including the Bolwig's organ pit-eye of Drosophila and the naupliar eye of most crustaceans, several groups have larvae with compound lateral eyes. The compound eyes of adults develop in a separate region of the head from the larval median eye.