The subarachanoid space lies between the arachnoid and pia mater. It is filled with cerebrospinal fluid. All blood vessels entering the brain, as well as cranial nerves pass through this space. The term arachnoid refers to the spider web like appearance of the blood vessels within the space.
Why do biologists organize living things into groups? What do the levels of classification indicate about the relationship between organisms? What characteristics are used to classify organisms into domains and kingdoms? What is the scientific study of how living things are classified called? Taxonomy
psychology is the scientific study of mental process , experiences and behavior the list of scopes are studies the mental process or activities; studies physical activities; emotional activities; studies animal behavior; studies physical structure and its activities; studies various stages of individual; studies various level of consciousness; ...