All the organ systems are laid down, at least in rudimentary form, and the embryo looks distinctly human by the of embryonic development. a) first weekb) second weekc) fourth weekd) eighth weeke) twelfth week

Option-(D):Eighth Week of the embryonic development.

Explanation:

The basic parts of the human body are developed after a sketch or map of the organs is placed while the offspring is in embryonic stages, as in between the 3rd and the eighth week of the embryonic stage, the embryo looks much more like a human baby, as its body shows the evidence of having some humanoid organs like heart, the digestive and respiratory systems.

As most of the body is covered by the integumentary system( the skin), while the blood is also present in the body. As visible signs of the offspring gender can be seen easily.

force tends to be low and long diustance masses are high