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
Every type of animal from birds to insects is studied by scientists under a particular branch of biology called zoology -- the study of animals.The scientists that study reptiles and amphibians are called herpetologists. These scientists dedicate large portions of their lives to the understanding of these creatures.very type of animal from birds to insects is studied by scientists under a particular branch of biology called zoology -- the study of animals.