Answer: Ectoderm
The neural tube is also formed by the ectoderm.
Explanation: The ectoderm is a germ layer that is formed in the embryo of an animal during development, it is the outer germ layer that covers an embryo (note that "Ecto" implies outside), the ectoderms develops to form internal and external structures.
The formation of the ectoderm occurs during a process known as gastrulation, which is the process of cell differentiation and rearrangement.
Functions of the ectoderm.
• The ectoderm forms the CNS (central nervous system) which comprises of the brain and the spinal cord.
• In vertebrate animals, the ectoderm layer or cell leads to the formation of both internal and external structures which includes nasar cavity, skin, nails, eye lens, mouth, enamel, hair follicles, skin sensor, etc.
Answer:
Ectoderm
Explanation:
The ectoderm give rise to neural crest, endoderm form the digestive tract while the mesoderm form the skeletal and connective tissue.
