The outer most layer of the hair shaft is the ______
Topics:Heart Human Reproduction Anatomy Muscles Germs & Diseases Virus Mutations, Replication, and Cancer Understanding Psychology Nervous System The Circulatory System Pathogens The Brain Our Control Center Nutrition - Digestive System Phlebotomy Medical Terminology Consciousness and Sleep Special Senses DNA Replication
Other quiz: Body System Interactions
David has diabetes. His sugar level is often rising and lowering. Which body system is in charge of regulating his sugar levels?