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1 edition of An essay on the structure and mechanism of the tongue of the chameleon found in the catalog.

An essay on the structure and mechanism of the tongue of the chameleon

by John Houston

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  • 22 Currently reading

Published by R. Graisberry in Dublin .
Written in English


Edition Notes

Statement[John Houston]
The Physical Object
Pagination27 pages :
Number of Pages27
ID Numbers
Open LibraryOL26259671M

Chameleons employ a power amplification mechanism to ballistically project their tongue as far as two body lengths from their mouth to capture prey [13][14] [15] [16][17][18]. To do so, the. The mechanism of a chameleons tongue is analogous in some sense to a catapult. Stored energy is released when the tongue is fired reaching prey at a distance longer than the length of the chameleons body in seconds at a speed of about 6 m/s. The chameleon elongates its sticky tongue at accelerations near 50 G (∼) with a power as great as W/kg.

chameleon tongue-projection mechanism with the first electromyographic record- ings from key muscles of the tongue, hyobranchial apparatus and head of Chamaeleo jacksonii. Early hypotheses of tongue function included rapid filling of the tongue by air or blood (Houston, ), launching of the tongue by a bone and muscle cross-bow.   - Anderson, Sheridan, Deban - Scaling of the ballistic tongue apparatus in chameleons - De Groot, van Leeuwen - Evidence for an elastic projection mechanism in the chameleon tongue - Wainwright, Bennett - The mechanism of tongue projection in chameleons.

Chameleon tongues are extremely fast and long. They can be anywhere from one to 1 1/2 times the bodylength of the owner and can rocket in and out with blinding speed. A 5 1/2" tongue reaches full extension in 1/16th of a second, which is fast enough to snatch a fly in midair.. It works like this: A "U" shaped hyoid bone anchors the tongue to the back of the mouth.   The researchers found that the tongue of a giant one-horned chameleon reached a top speed of 6 m/s. At that rate, it would slam into a prey item body lengths away in less than a .


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An essay on the structure and mechanism of the tongue of the chameleon by John Houston Download PDF EPUB FB2

"On the Structure and Mechanism of the Tongue of the Chameleon" is an article from The Transactions of the Royal Irish Academy, Volume View more articles from The Transactions of the Royal Irish Academy.

View this article on JSTOR. View this article's JSTOR metadata. chameleon tongue-projection mechanism with the first electromyographic record-ings from key muscles of the tongue, hyobranchial apparatus and head of Chamaeleo jacksonii.

Early hypotheses of tongue function included rapid filling of the tongue by air or blood (Houston, ), launching of the tongue by a bone and muscle cross-bowCited by:   Secret of the chameleon's ballistic tongue revealed: Reptile's firing mechanism uses three parts to hit fast-moving targets.

Researchers have proposed a mathematical model for the animal's tongue. Chameleon By: Taylor Ladd Classification: Phylum- Chordata, Class- Reptilia, Order- Squamata, Family- Chamaeleonidae, Genus- Chamaeleo, Species- al Description: The Chameleon is a colorful reptile with a tail and tongue the size of its body.

Their body is covered in scales that can change color to blend in with its surroundings so it makes it an amazing creature. At the core of a chameleon’s tongue is a cylindrical tongue skeleton surrounded by the accelerator muscle. The key structure in the projection mechanism is probably a cylindrical connective–tissue layer, which surrounds the entoglossal process This tissue layer comprises at least 10 sheaths that envelop the entoglossal process.

A chameleon's tongue is hollow and sits sheathed over this Hyoid horn. When a Chameleon is not taking aim at its prey, the tongue along with this mechanism is located at the bottom of the mouth, with the base seated in the throat just behind the head. the tongue projection mechanism of chamaeleonid lizards.

The chameleon tongue is invested with an elongate entoglossal process that cnters a lumen in the centre of the tongue and runs anteriorly to the tongue's tip (Gnanamuthu, ; Zoond, ; Gans. The most impressive feature of a chameleon's tongue is how fast it shoots out of his mouth. In less than a second, his tongue accelerates to more than 13 miles per hour until it snags its meal.

It retracts slower than it shoots out, but there's no need for stealth when the tongue is on its way back in -- it just needs to make it back before the. developed, resulting in three characteristics similar to the tongue of the chameleon: extensibility of the manipulator, flexibility of the mobile part, and absence of continuous force during the forward motion.

The first manipulator mimics the basic mechanism of the tongue of the chameleon and reproduced its basic performances. The chameleon is a special lizard with a unique mode of hunting—a projectile tongue that can extend twice its body length to latch on to prey.

Although this creature's spring-loaded feeding mechanism has been studied for years, the details of how it works have only recently come to light. Now, experts are studying its mechanisms to find new ways to improve the manipulative capabilities of.

The chameleon tongue apparatus consists of highly modified hyoid bones, tongue muscles, and collagenous elements.

[38] [39] [36] [40] The hyoid bone has an elongated, parallel-sided projection, called the entoglossal process, over which a tubular muscle, the accelerator muscle, sits.

The tongue of a chameleon is equally as amazing. When chameleons are hungry, they can use their super speedy, sticky, projectile tongue to catch prey. Their tongue is twice the length of their. A thick, honey-like adhesive at the tip of a chameleon’s tongue lets it bring its prey to its mouth after snagging it, scientists discover.

Watch: Chameleon tongues pack quite a. The mechanism of chameleon prey capture is unique among lizards, relying on ballistic projection of the tongue up to twice the length of the body in as little as second (7, 8).

This feeding mechanism is common to all chameleons and gives these slow, cryptic, sit-and-wait predators the element of surprise. In this paper we document the activity of key muscles of the tongue, hyobranchial apparatus and head during prey capture in the lizard Chamaeleo jacksonii Boulenger and use these data to test current hypotheses of chameleon tongue function.

Electromyographic recordings were made during 27 feedings from nine individuals and synchronized with high-speed video recordings ( fields s−1. Chameleon Tongue in Slow Motion - Behind the Scenes of Smarter Every Day - Duration: Smarter Every Day 2 Recommended for you.

True Facts About The Chameleon. The divinely green chameleon is capable of uncurling its long tongue, of twice its body length, in less than seconds. Now that represents a well respected weapon. So, despite the type of weather, the chameleons are going to snare their prey either way. To test the hypothesis that small chameleon species outperform larger species during ballistic tongue projection, performance was examined during feeding among 20 chameleon species in nine genera.

The ballistic projection of the chameleon tongue is an extreme example of quick energy re-lease in the animal kingdom. It relies on a complicated physiological structure and an elaborate balance between tissue elasticity, collagen bre anisotropy, active muscular contraction, stress release, and geometry.

The chameleon’s tongue can be up to times longer than his body and when not fully extended, is coiled inside the neck. When he spots his prey, the chameleon unfurls his tongue and flicks it out. The insect sticks to the chameleon’s tongue, which he then. The launching mechanism of the chameleon's tongue is finally revealed.

Slip of the Chameleon's Tongue. By Menno Schilthuizen Mar. 8,AM.Chameleon By: Taylor Ladd Classification: Phylum- Chordata, Class- Reptilia, Order- Squamata, Family- Chamaeleonidae, Genus- Chamaeleo, Species- al Description: The Chameleon is a colorful reptile with a tail and tongue the size of its body is covered in scales that can change color to blend in with its surroundings so it makes it an amazing creature.The skeleton of a chameleon is a bit different than the human skeleton.

A chameleon has much more ribs than mammals do. They also have a bone in their tongue and have a huge hollow bone on their head. Their spine has long tips on the vertebrae. Skeleton of a veiled chameleon Senses of a chameleon.

A chameleon has 5 senses, just like us.