The three germ layers

Question 1

What does the ectoderm give rise to?

Answer 1

• Outer surface (epidermal cells of skin)
• CNS (neuron of brain)
• Neural crest (pigment cell- melanocyte)

Question 2

What does the paraxial mesoderm give rise to?

Answer 2

• Dermis of skin
• Axial skeleton
• Axial and limb muscles

Question 3

What does the endoderm give rise to?

Answer 3

• Digestive tube (stomach cell)
• Pharynx (thyroid cell)
• Respiratory tube (lung cell)

Question 4

What does the intermediate mesoderm give rise to?

Answer 4

• Urogenital system (kidneys, gonads, respective duct systems)

Question 5

What does the lateral mesoderm give rise to?

Answer 5

• Somatic and splanchnic
• Ventro-lateral body wall (connective tissue)
• Heart and vasculature
• Wall of gut
• Bones of the limbs