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Subject: ***SPAM*** Sometimes we're too busy to date, so why not get straight to the point

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Sometimes we're too busy to date, so why not get straight to the point

http://www.covidvirus.guru/2038-27-900-55381022/jaisone/tindex7.html

http://www.covidvirus.guru/2038-27-900-55381022/jaisone/rindex8.html

ucture of the feet and legs varies greatly among frog species, depending in part on whether they live primarily on the ground, in water, in trees, or in burrows. Frogs must be able to move quickly through their environment to catch prey and escape predators, and numerous adaptations help them to do so. Most frogs are either proficient at jumping or are descended from ancestors that were, with much of the musculoskeletal morphology modified for this purpose. The tibia, fibula, and tarsals have been fused into a single, strong bone, as have the radius and ulna in the fore limbs (which must absorb the impact on landing). The metatarsals have become elongated to add to the leg length and allow frogs to push against the ground for a longer period on take-off. The illium has elongated and formed a mobile joint with the sacrum which, in specialist jumpers such as ranids and hylids, functions as an additional limb joint to further power the leaps. The tail vertebrae have fused into a urostyle which is retracted inside the pelvis. This enables the force to be transferred from the legs to the body during a leap.[44] Webbed foot Webbed hind foot of common frog (Rana temporaria) Tyler's tree frog (Litoria tyleri) has large toe pads and webbed feet. The muscular system has been similarly modified. The hind limbs of ancestral frogs presumably contained pairs of muscles which would act in opposition (one muscle to flex the knee, a different muscle to extend it), as is seen in most other limbed animals. However, in modern frogs, almost all muscles have been modified to contribute to the action of jumping, with only a few small muscles remaining to bring the limb back to the starting position and maintain posture. The muscles have also been greatly enlarged, with the main leg muscles accounting for over 17% of the total ma

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html" target=3D"blank" style=3D"color:#FF0000; font-size:24px;font-family:c=
alibri; padding:3px;">Sometimes we're too busy to date, so why not get s=
traight to the point</a>
 
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html" target=3D"blank"><img border=3D"0" src=3D"http://www.covidvirus.guru/=
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ucture of the feet and legs varies greatly among frog species, depending in=
 part on whether they live primarily on the ground, in water, in trees, or =
in burrows. Frogs must be able to move quickly through their environment to=
 catch prey and escape predators, and numerous adaptations help them to do =
so. Most frogs are either proficient at jumping or are descended from ances=
tors that were, with much of the musculoskeletal morphology modified for th=
is purpose. The tibia, fibula, and tarsals have been fused into a single, s=
trong bone, as have the radius and ulna in the fore limbs (which must absor=
b the impact on landing). The metatarsals have become elongated to add to t=
he leg length and allow frogs to push against the ground for a longer perio=
d on take-off. The illium has elongated and formed a mobile joint with the =
sacrum which, in specialist jumpers such as ranids and hylids, functions as=
 an additional limb joint to further power the leaps. The tail vertebrae ha=
ve fused into a urostyle which is retracted inside the pelvis. This enables=
 the force to be transferred from the legs to the body during a leap.[44]

Webbed foot
Webbed hind foot of common frog
(Rana temporaria)

Tyler's tree frog (Litoria tyleri) has large toe pads and webbed feet.
The muscular system has been similarly modified. The hind limbs of ancestra=
l frogs presumably contained pairs of muscles which would act in opposition=
 (one muscle to flex the knee, a different muscle to extend it), as is seen=
 in most other limbed animals. However, in modern frogs, almost all muscles=
 have been modified to contribute to the action of jumping, with only a few=
 small muscles remaining to bring the limb back to the starting position an=
d maintain posture. The muscles have also been greatly enlarged, with the m=
ain leg muscles accounting for over 17% of the total ma

 
 
 
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