Ventricles & central canal of spinal cord
Neural tube.
The neural tube
The neural tube develops into the brain and spinal cord during embryonic development.
Neural Tube
The neural tube develops into the vertebrate spinal cord. It forms early in embryonic development from a flat sheet of neural ectoderm that rolls into a tube, eventually differentiating into the brain and spinal cord.
The neural tube is the structure in mammalian embryos that develops into the brain and spinal cord. It forms from the ectoderm layer during development and gives rise to the central nervous system.
The neural tube is a structure that forms during early embryonic development and eventually develops into the central nervous system, which includes the brain and spinal cord. The neural crest, on the other hand, is a group of cells that arise from the edges of the neural tube and migrate to various parts of the body, giving rise to diverse structures such as peripheral nerves, skin pigment cells, and certain facial features. Both the neural tube and neural crest are crucial for proper neural development and the formation of the nervous system.
In the 3rd week of pregnancy called gastrulation, specialized cells on the dorsal side of the fetus begin to change shape and form the neural tube.
The first part to develop in a human is the neural tube, which eventually develops into the brain and spinal cord. This typically occurs during the third week of gestation.
The medical term for the inner diameter of a tube is "lumen."
These are the vessicles in the terminal button that contain the neurotransmitters.
Spina bifida occurs during the first trimester. Spina bifida is in a class of birth defects known as neural tube defects. The neural tube eventually develops into the spinal cord, brain and the tissues that enclose them. In a normal pregnancy the tube forms early and closes by the twenty eighth day. With spina bifida portions of the neural tube fail to develop properly causing defects of varying severity in the spinal cord and back bones. This is a complicated topic and you can read more about it at the related link.