Multiple choice Ectoderm cells in the embryo will form... lungs, intestine, pancreas skin, nervous system, eyes , ears heart, bones muscles Reveal answer Fill a bubble to check yourself B Correct answer Explanation The ectoderm is the outermost germ layer and gives rise to the epidermis (skin), the nervous system, and sensory organs like the eyes and ears. Mesoderm forms muscles and bones, while endoderm forms internal organs like the lungs and intestines.