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Heredity and Genetics
The Heart and Blood Vessels
The Respiratory System
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abnormality activity adrenal air sacs amino acids axon become blood pressure blood vessels bloodstream body cells bone Bowman's capsule brain breast calcium called cancer capillaries carbon dioxide cardiac cause cavity cell membrane cellular cent cerebral cervical chemical chromosomes contraction cycle develop diabetes diagnosis diastole digestive duct egg cell endocrine endometrium energy enzyme Figure fluid follicle function gene genetic gland headache heart disease hormone important individual infection insulin intestine kidney layer liver lung menstrual menstrual cycle metabolism molecule muscle muscular nephron nerve cell nerve impulse nervous system neuron normal occur organs ovary ovum oxygen pain pancreatic patient physical fitness physician pituitary plasma pregnancy produce prostate protein red blood cells respiratory result skin sperm cells spinal cord stomach structure sugar surface symptoms thyroid thyroxine tiny tion tissue treatment tube tubule tumor ulcer urinary urine uterine uterine tube uterus vaginal valve ventricle x-ray