Brain vessels enter the central nervous system through holes in the meningeal layers. The cells in the blood vessel walls are joined tightly to one another, forming the blood–brain barrier, which blocks the passage of many toxins and pathogens (though at the same time blocking antibodies and some drugs, thereby presenting special challenges in treatment of diseases of the brain). Neuroanatomists usually divide the vertebrate brain into six main regions: the telencephalon (cerebral hemispheres), diencephalon (thalamus and hypothalamus), mesencephalon (midbrain), cerebellum, pons, and medulla oblongata. Each of these areas has a complex internal structure. Some parts, such as the cerebral cortex
Where the Spies Are studio arranged the schedule accordingly. Françoise Dorléac was cast off the back of her success in "That Man from Rio". The film was shot on location in Beirut. Alfredo Antonini served as the orchestra conductor for the film. David Niven and Val Guest took an option on the next five James Leasor books about Jason Love. Two of them were written - "Passport to Peril" and "Passport to Peking" - with three unwritten. Where the Spies Are Where the Spies Are is a 1966 British comedy adventure film directed by Val Guest and featuring David Niven as Dr Jason Love,