carbon monoxide, A poisonous gas that reduces the amount of oxygen carried in the blood, development, The process of changes in abilities and body structures as a person grows, embryo, A developing human before birth, nicotine, An addictive substance found in tobacco, particulates, Tiny solid particles in cigarette smoke that damage the lungs, tar, A sticky black substance in tobacco smoke that can cause cancer, antagonistic, Two muscles that work in opposite directions to move a bone, muscles, Body parts that pull on bones to cause movement, joints, Places where two bones meet, biceps, A muscle in the upper arm that bends the elbow, exoskeleton, A hard outer skeleton found in insects, tendons, Tough cords that attach muscles to bones, triceps, A muscle in the upper arm that straightens the elbow, contraction, When a muscle shortens to produce movement

[SCI7] UNIT 7.3 + 7.4

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