22. From which germ layer do
the epidermis and the nervous
system originate? What are
other organs and tissues made
from that germ layer?

Gap-fill exercise

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Epidermis and nervous system the
same embryonic origin: ectoderm.
The epidermal appendages ( nails,
hair, sweat glands sebaceous
glands), the mammary , the
adenohypophysis, the cornea,
crystalline lens and the are also
derived from .