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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
People about to have surgery must tell their health care providers about all supplements they take.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.