From which embryonic layer do the gonads develop?
Solution
Correct Answer: Option A
- The gonads develop from the intermediate mesoderm, which is a specific region of the mesoderm located between the paraxial and lateral plate mesoderm during embryonic development.
- This layer gives rise to the urogenital ridge, which subsequently differentiates into the gonadal ridges.
- These gonadal ridges are the precursors of the testes and ovaries.
- The lateral plate mesoderm primarily contributes to the development of the cardiovascular system, body wall, and limbs, but does not form the gonads.
- The endoderm mainly forms the lining of the gastrointestinal tract, respiratory system, and various glands, but not the gonads.
- The ectoderm develops into structures such as the skin, nervous system, and certain sensory organs, but it is not involved in gonadal formation.
Thus, the intermediate mesoderm is crucial for the formation of the gonads and parts of the urinary system.
Reference: Gray's Anatomy, 41st Edition, Embryology/Development of the Genitourinary System, Chapter 5
- This layer gives rise to the urogenital ridge, which subsequently differentiates into the gonadal ridges.
- These gonadal ridges are the precursors of the testes and ovaries.
- The lateral plate mesoderm primarily contributes to the development of the cardiovascular system, body wall, and limbs, but does not form the gonads.
- The endoderm mainly forms the lining of the gastrointestinal tract, respiratory system, and various glands, but not the gonads.
- The ectoderm develops into structures such as the skin, nervous system, and certain sensory organs, but it is not involved in gonadal formation.
Thus, the intermediate mesoderm is crucial for the formation of the gonads and parts of the urinary system.
Reference: Gray's Anatomy, 41st Edition, Embryology/Development of the Genitourinary System, Chapter 5
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