Neurons, also known as nerve cells, connecting to each other to form networks, are the core components of the nervous system. They are potent tools in studying function of the neural system. Cyagen OriCell Sprague-Dawley (SD) Fetal Rat Hippocampus Neurons are derived from the cortex of qualified SD rats embryos (18.5 dpc) and cultured as monolayer before cryopreservation. These cells express specific clusters of differentiation proteins for neurons. They are tested negative for bacteria, fungi, mold and mycoplasma.