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
Science is the study of the world using collected knowledge,  observation, and experimentation. A science is any one of  innumerable fields of study and inquiry, some of w â¦ hich include  facets of mental as well as physical phenomena.    Science can be defined as a method for studying the natural world.    Another definition is the organized body of knowledge concerning  the physical world, both animate and inanimate, and the attitudes  and methods through which this body of knowledge is formed..   Science is the systematic study of nature.    Science is all about discovering how and why things happen in the  world. Science is a human enterprise in which knowledge is acquired  and organized through careful observation, analysis, and repeated  experimentation.