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
The noun CLASSIFICATION has 4 senses: 1. the act of distributing things into classes or categories of the same type. 2. a group of people or things arranged by class or category. 3. the basic cognitive process of arranging into classes or categories.4. restriction imposed by the government on documents or weapons that are available only to certain authorized people. Familiarity information: CLASSIFICATION used as a noun is uncommon.. the act of distributing things into classes or categories of the same type. 2. a group of people or things arranged by class or category. 3. the basic cognitive process of arranging into classes or categories.