Did you know?
Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
Human immunodeficiency virus (HIV)
Thorax Posterior view of human body
Schematic map of the human mitochondrial genome.
A single base substitution leading to a single amino acid substitution in the hemoglobin beta chain
The supralaryngeal airway in a chimpanzee and a human.
The amount of genetic variation within populations is far greater than the variation between populat