These cells line focal pits of the CNS and, in specific spots, deliver CSF. The cilia of these cells help flow the CSF that sustains and pads the mind and spinal string. Expansions from these cells wrap vessels and give additional control over which materials enter or leave the intercellular liquid of the CNS.
The correct answer is letter A. Venom glands and varied diets are the reasons why cane toads are considered as invasive species in Australia. They cause major ecological imbalance within their immediate surroundings and have caused an infestation all over Australia.
