Assuming you're talking about the development of a foetus inside the womb - the arms usually start to form first (or 'bud' from the body) - this is shortly followed by the leg buds.
Most of the time the back legs start growing first. I have raised a couple hundred tadpoles, and I think every time the back legs were first.
packs of crayons spiders legs ... octopus's arms ...
First the cut off their arms and legs then they eat them
2 arms and 2 legs
2 arms and 2 legs
How about Legs and Arms.
Giraffes have four legs, but no arms.
A cyclops with no arms or legs
Two arms and two legs.
An "extremity" refers to your limbs (arms and legs). Lower extremities are your legs; upper extremities are your arms.
There are many things that can be brown and have no arms or legs. A snake can fit this description, it has no arms or legs and slithers around. Some worms are brown and do no have arms or legs.
They don't have arms and legs. They have tentacle's