porcupine quill barbsmsci world ticker

Weighing 5–16 kg (12–35 lb), they are rounded, large, and slow, and use The African porcupine is not a climber and forages on the ground.Defensive behaviour displays in a porcupine depend on sight, scent and sound. He and his team ran experiments comparing a barbed quill to a barbless quill, measuring the forces required to insert and remove barbed spears.In contrast to a barbless quill or a surgical staple — which tear the tissue and create gaps that are susceptible to infection — the barbed quill's design means it does minimal damage on the way in, the researchers found.A new type of medical staple that had two barbed tips would require much less effort to place, Karp figures, and the gripping power of the barbs would hold it in position without needing to bend the staple.Karp says he anticipates making the new staples out of biodegradable material so they will fully dissolve over time without having to be removed.The challenge now is to recreate the full barb's shape. 11. Quills have barbs that cannot be seen by the naked eye. For other uses, see Parker, SB (1990) Grzimek's Encyclopedia of Mammals, vol. The slow-moving herbivore only uses the quills as a last-resort defense against predators.The quills are actually specialized hairs, and mostly lie flat against the animal's body. They also helped drive the quill in deeper, until it exited (though it would have been stopped by a harder material, such as bone).It was the barbs that most interested Karp. The North American Porcupine has about 30,000 quills.

A porcupine has approximately 30,000 quills on its body.

"We've been using sutures and staples for decades, and they've been incredibly useful," says Jeff Karp, a bioengineer at Brigham and Women's Hospital in Boston and professor of medicine at Harvard Medical School.

At first, the idea of using porcupine quills to patch up wounds sounds torturous.

Each quill has a microscopic barb on the end which makes it difficult to dislodge.

"But there are challenges in terms of placing them for minimally invasive procedures.

The more the dog moves, the more likely quills are to break and travel further into his face or paws. Bioengineers think the same sort of barbs could help keep dissolvable medical staples in place until a wound heals.Left: A microscopic image compares the size of a North American porcupine's quill tip with the tip of a narrow, 18-gauge needle. He kept the quill as a souvenir.The quill's barbs eased its penetration into his flesh.
By that time, the quill had traveled in one direction and cleanly exited his lower arm.

Porcupines can be found on rocky areas up to 3,700 m (12,100 ft) high. Quills have adorned seapottery flowers, a giant moon’s eye, and a porcupine woman. [15] A unique pungent odor and ominous teeth are further clues that dogs, mountain lions and other potential predators should stay away.If that doesn't work, a porcupine will use its powerful, spiky tail to slap at the aggressor. Each quill boasts 700-800 barbs that could end up in your dog’s skin. Only when threatened will the porcupine erect them. Because of their barbs, porcupine quills can get stuck in a dog's soft tissue can move deeper into the body if they're not removed right away. Broken quills can become embedded and migrate within … He was once quilled in his bicep while up in a tree, trying to catch an agile porcupine.Despite his wife's suggestion afterward that he immediately seek medical care, he waited two harrowing days. It takes about 10-42 days to replace quills … They are generally nocturnal, but are occasionally active during daylight. The quill tip in this finger has microscopic, backward-facing barbs that make the quill hard to remove. "It's part of the work of killing a porcupine. When scientists examine the skulls of deceased mountain lions, Roze says, they often find the tips of porcupine quills embedded in the lions' jaw bones"The mountain lion just accepts it," said Roze. But current staples, made of metal, tear tissue on the way in and cause more damage when bent to stay in place.Karp and his team have been searching for new ways to hold tissue together.One brainstorming session led to a discussion of a porcupine and its quill.The North American porcupine appears cute, but it has more than 30,000 menacing quills covering much of its body, each one hollow and two to three inches long. This opens the door for infection, and the deeper the quills penetrate, the more serious the infection can be.

Quills Can Cause Internal Damage. Lakota women would harvest the quills for quillwork by throwing a blanket over a porcupine and retrieving the quills it left stuck in the blanket.

There are four main displays seen in a porcupine which are quill erection, teeth clattering, emitting of odour, and attack.Quills are released by contact or may drop out when the porcupine shakes its body. Embedded quills can cause death or injury to most predators. And, contrary to a common myth, porcupines don't shoot the quills out from their bodies. While porcupine quills are not poisonous, only a doctor or veterinarian should attempt to remove them.

The porcupine mating ritual involves a vicious battle—and urination on the female.

They live in forests and deserts, rocky outcrops, and hillsides. "This could be an enabler for smaller incisions to be made in a large number of surgeries," Karp says. The barbed quills also slide in with less force than a hypodermic needle of the same width, or than the quill of an African porcupine, which doesn’t have any barbs (see end of post).

4, McGraw-Hill, New York. Often, these displays are shown when a porcupine becomes agitated or annoyed.

Yet these traditional tools designed to aid healing can create their own problems.

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