Craniofacial development

Question 1

what happens to a fertilised egg?

Answer 1

• Divides rapidly into a ball of cells (blastocyst)
• From day 4 to around week 8 in utero the cells of the blastocyst differentiate and organise into diff tissues and organ systems
• Many more processes begin to occur

Question 2

What are the neural crest cells?

Answer 2

• Temporary group of cells that arise from the embryonic ectoderm germ layer
• Highly migratory and specialised cells capable of predetermined differentiation