Detailed Instructions: In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.
Problem:El acceso de farmacos al Sistema Nervioso central esta condicionado por la existencia de la barrera hematoencefalica (BHE) dicha barrera
Solution:
The access of drugs to the central Nervous System is conditioned by the existence of the blood-brain barrier (BHE) barrier