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The Heart and Circulatory System
The Lungs and Respiratory System
The Bones Joints and Muscles
12 other sections not shown
abdominal abnormal acid activity angina antibiotics arteries baby bacteria become bladder bleeding blood pressure blood vessels body bone brain breast breathing called calories cancer cause cells centimeters cervix changes chemical chest cholesterol chronic cirrhosis colon common condition COPD damage develop diabetes diagnosis diet digestive doctor drugs effective emphysema endometriosis esophagus examination exercise factors fiber fluid frequently function gallbladder glands glomerulus gynecomastia hair heart attack heart disease hormone hysteroscopy important increased infection inflammation intestines joint kidney liver lungs male muscle nerve normal occur older organs ovulation oxygen pain patients penis percent physical physician pregnancy prevent problem produce prostate protein reduce removed result risk sexual skin smoking sperm stomach suffer surgery surgical symptoms tell tests therapy tion tissue treated treatment tube tumors ulcer ureter urethra urinary urine usually uterus vagina vitamins women X-ray