At the end of first trimester the embryo its is all organy and extremitys are formed.After this period baby take weight and more changes are seen in organs like brain.
As a result of interactions between the ectoderm and underlying mesoderm, formation occurs around the fourth week of development.
In the embryo, the bones of the arms and legs are initially formed from a cartilage model, primarily made of hyaline cartilage. This cartilaginous structure provides a template for future bone development through a process called endochondral ossification, where the cartilage gradually transforms into bone. This process allows for growth and development of the limbs during fetal development.
2 arms and 2 legs
How about Legs and Arms.
A cyclops with no arms or legs
2 arms and 2 legs
Giraffes have four legs, but no arms.
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
Monkeys have two legs and two arms.