The nervous system Flashcards
How many regions does the brain have?
What does this include?
what is the CNS and PNS made up of?
The central nervous system (CNS) is made up of the brain, cerebellum and the spinal cord.
Nerves make up the peripheral nervous system (PNS), which works to send signals to and from the CNS, the body’s organs, muscles, and senses.
What is the developmet of the nervous system
entire nervous system forms by theprocess called neurulation (4th week ofgestation)* In the third week of embryogenesis, three germ layers form (gastrulation), namely,endoderm, mesoderm, and ectoderm* The nervous system develops from the ectoderm* The ectoderm gives rise to the neural plate(flat layers of cells), and then folds to formthe neural tube* The neural tube gives rise to three primary vesicles* Forebrain (prosencephalon)* Midbrain (mesencephalon)* Hindbrain (rhombencephalon)
What is neurolation
In a process called neurulation, the neural folds curve upward and fuse to form the neural tube, which will eventually become the CNS. The neural plate also forms the neural crest, cells of which will later migrate to different parts of the body and become most of the cells in the PNS and ANS.
Development of the brain-neural tube
The neural tube formation during gestational development is a complicated morphogenic process that requires various cell signaling and regulation by a variety of genes. It starts during the 3rd and 4th week of gestation.
What are the functions of the nervous system?
