A section through the caudal part of the neural tube.
Observe:
1. The cranial part of the hindgut.
2. The splanchnopleure formed from gut endoderm and splanchnic mesoderm.
3. The somatopleure formed from ectoderm and somatic mesoderm.
4. The embryonic coelom separating splanchnopleure and somatopleure.
Keywords: coelomic cavity, communication between coelomic cavity and extra-embryonic coelom, hindgut, intermediate mesoderm, lateral body fold, neural canal, neural tube (spinal cord part), paraxial mesoderm, right dorsal aorta, right umbilical vein, somatopleure, splanchnopleure, vitelline plexus
Source: Atlas of Human Embryos.