Neurulation and neural tube development — Flashcards

Flashcard 1: What is the embryonic origin of ependymal cells? _____

Answer: Neural tube (neuroectoderm)

Flashcard 2: Which form of spina bifida is associated with herniation of meninges and neural tissue through the bony defect? _____

Answer: Meningomyelocele

Flashcard 3: Which form of spina bifida is associated with myelomeningocele? _____

Answer: Spina bifida cystica

Flashcard 4: Neurulation begins in the _____ week of fetal development

Answer: third

Flashcard 5: What is the embryonic origin of astrocytes? _____

Answer: Neural tube (neuroectoderm)

Flashcard 6: What is the embryonic origin of melanocytes?_____

Answer: Neural crest

Flashcard 7: Tracheal cartilage is derived embryologically from _____.

Answer: splanchnic mesoderm

Extra: The internal lining (epithelium and glands) of the larynx, trachea, and bronchi is derived from **endoderm**.\n\nThe cartilaginous, muscular, and connective tissue components (including the tracheal rings) are derived from **splanchnic (visceral) mesoderm**.

Flashcard 8: What rare neural tube defect is characterized by protrusion of the brain and meninges through an abnormal opening in the skull?_____

Answer: Encephalocele

Flashcard 9: mastoid air cells

Answer: 1st pouch

Flashcard 10: Endoderm lined structures of the ear (1st pharyngeal pouch)

Answer: 1st pouch