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• Select Blood

  1

  Blood

  Author:Kathleen ScognaFrom:The Gale Encyclopedia of Science (Vol. 1. 6^th ed.)

  20212,699 words Topic overview 1120LBlood is a liquid connective tissue that performs many functions in the body, including transport of oxygen, carbon dioxide, nutrients, waste products, and hormones; clotting; and defense against microorganisms. Blood...
• Select Anatomy, Comparative

  2

  Anatomy, Comparative

  Editors:Katherine H. Nemeh and Jacqueline L. LongeFrom:The Gale Encyclopedia of Science (Vol. 1. 6^th ed.)

  2021562 words Topic overview 1160LThere are many forms of evidence for evolution. One of the strongest is comparative anatomy; comparing structural similarities of organisms to determine their evolutionary relationships. Organisms with similar anatomical...
• Select Nervous System

  3

  Nervous System

  Author:Mary FinleyFrom:The Gale Encyclopedia of Science (Vol. 5. 6^th ed.)

  20212,512 words Topic overview 1260LThe nervous system coordinates behavior and helps to maintain the internal stability of animals. It may be as simple as the nerve net of Cnidarians or as complex as the centralized system of mammals. In all nervous...
• Select vertebrates

  4

  vertebrates

  Editors:E. D. Hirsch, Jr., Joseph F. Kett, and James TrefilFrom:The New Dictionary of Cultural Literacy: What Every American Needs to Know (3^rd ed.)

  200232 words Brief article, Defin... 820LPronunciation: (vur-tuh-bruhts, vur-tuh-brayts) Animals that have a spinal cord enclosed in a backbone. The five traditional classes of vertebrates are amphibians, birds, fishes, mammals, and reptiles. (Compare...