Chordate embryos develop a notochord along the dorsal side. this position is located at the of the embryo.

this position is located at the back of the embryo.

Explanation:

The notochord, also called the dorsal cord, is a stick formed by cells that is located on the back of the embryos of the chordates, that is, on the back of the embryo. This structure originates from the differentiation of the mesoderm, and its function is to support the nervous tube. In most chordates, this structure disappears at the end of the embryonic phase.

The dorsal nervous system, also known as the dorsal nervous tube, originates from the ectoderm of the embryo (forming the nervous tube) and is located in the dorsal region of the body, under the embryonic notochord. It is from this tube that the nervous system will be formed. In the anterior part of the embryo's body there is a dilation of this cord, forming the brain vesicle, which in vertebrate animals will give rise to the brain.

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