iv Health Science: Concepts and Applications Copyright Goodheart-Willcox Co., Inc. Louise Braubach Health Science Instructor West Mesquite High School Valerie Chin Health Science Instructor Spring High School Nestelynn Friday Master Health Science Teacher Nimitz High School Wendy Jackson Registered Nurse Clinical Educator Lakeview Centennial High School Kelley Kirby Health Science & Pharmacy Technician Instructor Central High School Maire Beth Mallard Health Science Educator Georgetown High School Melissa Marek Health Science Instructor Cypress Springs High School Oscar Martinez Health Science Instructor Socorro Independent School District Sarah Moreno Health Science Instructor San Marcos High School Joe Nolen Health Science Technology Teacher Texas High School Reviewers Goodheart-Willcox Publisher and the authors would also like to thank the following instructors who reviewed selected manuscript chapters and provided valuable input into the development of this textbook program. James Saunders Health Science Teacher Garland High School Angela Vong Health Science Technology Instructor Clear Brook High School Rebecca Ysaguirre, RN Health Science Instructor Health Careers High School National Health Science Assessment (NHSA) Certifi cation Health Science: Concepts and Applications delivers thorough, comprehensive coverage of the technical knowledge and skills required for a career in healthcare. Goodheart-Willcox is pleased to correlate Health Science: Concepts and Applications to the National Consortium for Health Science Education’s National Health Science Assessment (NHSA) exam, provided by Precision Exams. The NHSA standards and exam were created in concert with industry and subject matter experts to match real-world job skills and marketplace demands. Students who pass the National Health Science Assessment can earn a certificate validating their knowledge for colleges and employers. To see how Health Science: Concepts and Applications correlates to the NHSA exam provided by Precision Exams, please see the Health Science: Concepts and Applications correlations at www.g-w.com. For more information on the National Health Science Assessment, please consult the accompanying Health Science: Concepts and Applications Instructor Resources or go to www.healthscienceconsortium.org/assessment. Andresr/Shutterstock.com