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
1. The classification and naming of organisms in an ordered system that is intended to indicate natural relationships, especially evolutionary relationships. 2. The science, laws, or principles of classification.3. An ordered arrangement of groups or categories: a taxonomy of literary genres.. the technique or science of classification. 2. the scientific identification, naming, and classification of living things. Also called systematics. â taxonomist, n. â taxonomie, taxonomical, adj. a system of naming things, as plants or animals. â taxonomist, n. â taxonomie, adj.