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Scan of Figure 2, from Darwin's Descent of Man, second edition, illustrating Darwin's tubercle. This atavistic feature is so called because its description was first published by Charles Darwin in the opening pages of The Descent of Man, and Selection in Relation to Sex, as evidence of a vestigial feature indicating common ancestry among primates which have pointy ears.
The ears of a macaque monkey and most other monkeys have far more developed muscles than those of humans, and therefore have the capability to move their ears to better hear potential threats. [40] Humans and other primates such as the orangutan and chimpanzee however have ear muscles that are minimally developed and non-functional, yet still ...
Dr. Turegano says keloids can form after an injury, but they can also occur in a surgical scar, ear piercing, tattoo, or in skin conditions like acne or chicken pox.
They present as multiple small or large bumps characteristically on the heels and wrists. [2] Most are asymptomatic and pain is rare, although some may present with pain before the bumps are noticed. [3] They generally occur bilaterally and display a yellowish to skin-color. [3] They may feel soft or firm. [3] [4]
What they look like: Chiggers, a type of small mite, typically leave clusters of bites that are often very itchy. In many cases, chigger bites appear as small, red and itchy bumps. Sometimes, they ...
Canaloplasty, where the ear canal is widened using grafts, was first proposed as the treatment for keratois obturans. However, with the migration of keratin within the canal, any amount of widening could not restore the migration of skin. Reconstruction of the bony canal with cartilage graft from temporalis fascia has showed some results. [6]
Ear Infections: Bumps can sometimes be a sign of an ear infection, especially if accompanied by pain and fever. Folliculitis: Inflammation of the hair follicles can cause bumps that might be ...
The human botfly, Dermatobia hominis (Greek δέρμα, skin + βίος, life, and Latin hominis, of a human), is a species of botfly whose larvae parasitise humans (in addition to a wide range of other animals, including other primates [1]).