Illustration of a man overexercising and the resulting syndrome of rhabdomyolysis. Rhabdomyolysis is the breakdown of skeletal muscle tissue, which releases large amounts of myoglobin into the bloodstream. Causes include excessive exercise, heatstroke, infections, substance abuse, and trauma.

Illustration of the brain and spinal cord superimposed on the body of a man, back view.

Illustration of the brain and spinal cord superimposed on the body of a man, back view, with a background of neurons afflicted by multiple sclerosis. Multiple sclerosis is a neurodegenerative disease, and is characterized by demyelination of the axons of neurons in the central nervous system.

Medical illustration showing white blood cell plugging up a capillary, causing ischemia. Ischemia is a deficiency of blood in a particular area, due to constriction or obstruction of a blood vessel (in this case, caused by white blood cells).

Fetus in the womb with spina bifida. Spina bifida is a congenital defect where part of the spinal vertebrae are absent causing the spinal membrane and cord to protrude.

The first eight weeks of the development from a newly fertilized egg to an eight week fetus.

Medical illustration showing acute myocardial infarction. A myocardial infarction, death of a portion of heart muscle, causes a blocked coronary artery which consequently causes a heart attack. The inset shows ischemic damage to the myocardial tissue.

Pencil drawing of hands holding a chest x-ray.

Medical illustration of a normal heart with inset showing myocardial tissue.

Diagnosing the body through computer technology.

Illustration of progression of coronary heart disease.

Illustration of a pulmonary embolism.

Inhibition of the coagulation cascade. Factors Va and VIIIa deactivated by protein C and protein S complex.

Illustration depicting a stroke.

Medical illustration of water changing into bone marrow.

Medical illustration showing blood flow in open artery.

Medical illustration of the heart's three pumping mechanisms.

Illustration of new life formation.

Medical illustration of syringe and pills- drug therapy.

Glass male figure running between lungs.