Oyster shells - The implements used during the glacial age for haircutting and styling were made of Image - Your outward appearance and conduct in the workplace projects your professional Pathogenic - Bacteria that are harmful microorganisms and can cause disease of infection in humans are Bleach - You can irritate your lungs if you inhale the fumes frfom Anatomy - The study of the human body structures and how the body parts are organized Tonsure - During the middle ages, clergymen wore a distinguishing hair style know as Good posture - To prevent fatigue and other physical problems, you should practice Staphylococci - Pus-forming bacteria that grow in clusters like a bunch of grapes Stiff brush - You should remove hair particles from clipper blades with a Protoplasm - The colorless jellylike substance found inside cells is Peter the great - The historical figure that encouraged shaving by imposing a tax on beards