Embryology and Development — Flashcards

Flashcard 321: The sclera (except supero-temporally) and ciliary muscles are formed from _____

Answer: Neural crest

Extra: The supero-temporal portion of the sclera is derived from paraxial mesoderm.

Flashcard 322: Forehead, bridge of the nose, the medial and lateral nasal prominences are formed by _____ prominence

Answer: frontonasal

Flashcard 323: Tympanic cavity is formed from the _____ pharyngeal pouch

Answer: first

Flashcard 324: What are the two derivatives of the mandibular prominence of the first pharyngeal arch?_____

Answer: Meckel's cartilage and mesenchyme

Flashcard 325: Embryologically, Parotid is derived from the _____

Answer: ectoderm

Flashcard 326: Which part of middle ear are formed from the otic capsule?_____

Answer: Stapes footplate and annular ligament

Flashcard 327: The _____ sinus develops until early adulthood.

Answer: frontal

Flashcard 328: Anatomical closure of the fetal circulatory adjustments occurs in the following sequence: _____

Answer: Ductus venosus > Ductus arteriosus > Foramen ovale

Flashcard 329: Which germ layers of the embryo are derived from the epiblast?_____

Answer: All 3 (ecto,endo,mesoderm)

Flashcard 330: The secondary ossification centres of the distal end of the femur appear at _____ month of intrauterine life

Answer: 9th