*130,26
A frog has muscles attached to most
bones in its body; it couldn't move
without muscles.
>S(21),139,131
*131,26
The muscle you removed comes from the
abdominal wall.
>S(21),139,132
*132,26
A frog's body contains over 200
skeletal muscles.
>S(21),139,133
*133,26
Many of them are attached to the bones
in pairs, each moving the bone in the
opposite way.
>B(21),139,136
>E(21),139,134
*134,26
In addition to skeletal muscles, the
frog has cardiac muscles and smooth
muscles.
>E(21),139,135
*135,26
These are "involuntary," not voluntarily
controlled by the frog.
>E(21),139,136
*136,26
Frog and human muscles are a lot
alike. Both are made up of thousands
of tiny fibers.
>B(20),139,0
>E(21),139,137
*137,26
Frog muscles and its skeleton are
adapted in ways that humans are not.
One kind of African frog can jump 14
feet.
>E(21),139,138
*138,26
The human record for a standing jump
is 11 feet, 11 3/4 inches.
>E(20),139,0
*139,46
Muscles are attached to bones by
tendons.
>S(01),0,140
*140,46
When the muscle contracts, it pulls
the bone in the direction of the
contraction.
>S(00),0,0
*1000