Humans are the only mammals that continue to drink milk after they finish breastfeeding as babies. However, around 60 percent of all people are estimated to develop lactose intolerance, which is the inability to digest dairy products, according to a Cornell University News Service.

Every year, about 1 in 6 people in the U.S. experience food poisoning, or foodborne illness, according to the Centers for Disease Control and Prevention. Foodborne illness occurs when you ingest a food or beverage contaminated with toxins or illness-causing pathogens such as bacteria, viruses or parasites.

Your biceps are one pair out of more than 600 muscles in your body that contract to move your bones. Tendons connect your biceps to your bones at your shoulder and elbow joints. Bicep pain is attributed to problems with the shoulder joint, elbow joint, or the bicep muscle.

Just like a rubber band, your skin is designed to stretch and snap back — when the skin stretches too far, it breaks instead of snapping back. This results in scar tissue development known as stretch marks. These red-and purple-markings can be the unsightly reminder of weight gain and/or a growth spurt.

A metallic taste in the mouth can seem alarming at first, but it's common and can be caused by various factors.

Cassava is widely cultivated as a food crop in tropical and subtropical areas of Africa, Asia and Latin America. The starchy roots of this plant are used to make tapioca and many other foods. If cassava is not properly prepared, it contains toxic compounds that may increase your risk of developing diabetes.

One of the main functions of the heart and blood vessels is to supply the body with oxygenated, nutrient-rich blood. The ability of the heart to pump blood out to the body, called cardiac output or stroke volume, is determined by three characteristics, according to the University of Virginia School of Medicine.

There is no single, generally accepted definition for heavy smoking. A study reported in the September 2013 issue of the “International Journal of Environmental Research and Public Health” defined heavy smoking as 20 or more cigarettes per day, or 20 or more pack-years.

A colonoscopy is a lower gastrointestinal test used to examine the lining of the colon and rectum for abnormalities such as colon polyps, inflammation, ulceration, bleeding and colon tumors.

Laxatives are over-the-counter medications used to help relieve and prevent constipation. These products work by creating soft or loose stools or by inducing a bowel movement.

Amlodipine besylate is a medication in a class of drugs known as calcium channel blockers. It is prescribed for angina, a condition characterized by episodes of crushing chest pain, which usually results from a lack of oxygen in the heart muscle due to clogged arteries.

Implantation occurs about six to 12 days after conception, according to the American Pregnancy Association. Implantation is the term used to describe the attaching of the fertilized egg to the woman's uterus, an important first step in the process of developing the fetus into a baby.