01 September 2015, 12:33 PM ET
Denali, formerly known as Mount McKinley, rises more than 20,000 feet above sea level.
01 September 2015, 02:27 AM ET
The small intestine is about as big around as a middle finger, but it is about 22 feet (6.7 meters) long.
01 September 2015, 02:21 AM ET
Kidneys are bean-shaped organs located on both sides of the spine, behind the stomach. Their main purpose is to keep the composition of blood in the body balanced to maintain good health.
01 September 2015, 02:14 AM ET
The stomach is a bean-shaped sack located behind the lower ribs. It is the first stop in the digestive tract before food moves on to the small intestine.
01 September 2015, 02:08 AM ET
The esophagus is a tube that connects the throat (pharynx) and the stomach. Within it, muscles contract to move food to the stomach.
28 August 2015, 11:58 PM ET
The large intestine, also called the colon, is part of the final stages of digestion. It is a large tube that escorts waste from the body.
27 August 2015, 12:47 PM ET
Thousands died and millions were left homeless in the most destructive storm to hit the United States.
27 August 2015, 01:02 AM ET
Dietary fiber is a plant-based nutrient that is sometimes called roughage or bulk. Fiber is important to digestion and regularity, weight management, blood sugar regulation, cholesterol maintenance and more.
26 August 2015, 04:11 PM ET
The human circulatory system keeps blood, oxygen and nutrients flowing through the body.
25 August 2015, 07:34 PM ET
Carbohydrates — one of the basic food groups — are the sugars, starches and fibers found in fruits, grains, vegetables and milk products. They are important to a healthy life.
25 August 2015, 07:21 PM ET
Vitamin A is good for healthy vision, skin, bones and other tissues in the body. Vitamin A often works as an antioxidant, fighting cell damage, but it also has many other uses.
25 August 2015, 12:32 AM ET
Riboflavin is a B-complex vitamin that helps the body break down carbohydrates, proteins and fats to produce energy.
24 August 2015, 09:37 PM ET
The human skeleton has 206 bones and performs several vital functions.
22 August 2015, 06:37 AM ET
Zofran: Dosage, Side Effects & Pregnancy
21 August 2015, 03:23 PM ET
The corpse flower is a pungent plant that blooms rarely and only for a short time. While it is in bloom, the flower emits a strong odor similar to rotting meat or, aptly, a decaying corpse.
20 August 2015, 09:39 PM ET
El Niño is a climate cycle in the Pacific Ocean with a global impact on weather patterns.
20 August 2015, 02:28 AM ET
Vitamin B6 is important to maintaining a healthy body and developing a healthy brain.
18 August 2015, 07:32 PM ET
Vitamin K is known as the “blood-clotting vitamin” for its important role in healing wounds.
12 August 2015, 01:17 AM ET
Vitamin C, also called ascorbic acid, is important to many functions in the body. Many fruits and vegetables are good sources of vitamin C. Research is mixed on whether it really helps treat the common cold.
12 August 2015, 12:47 AM ET
Niacin is an essential vitamin that helps the digestive system, skin and nervous system to function.
01 August 2015, 02:22 AM ET
Vitamin B1, also called thiamine, is a B complex vitamin. It is found in many foods and is vitally important to keeping a body operating properly.
31 July 2015, 06:42 PM ET
Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight into chemical energy.
31 July 2015, 12:30 AM ET
An ectopic pregnancy occurs when a fertilized egg implants outside of the uterus or not within the uterine cavity.
30 July 2015, 01:57 AM ET
Vitamin B7, also called biotin, is a vital part of a healthy metabolism and creating important enzymes.
30 July 2015, 01:40 AM ET
Almond milk is a drink made from water and ground almonds. It is a popular plant-based alternative to cow’s milk.
28 July 2015, 10:04 PM ET
Homo floresiensis, a diminutive hominin dubbed the hobbit, lived about 17,000 years ago on a remote Indonesian island.
28 July 2015, 09:22 PM ET
Magnetism is the phenomenon that arises from the force between objects that produce fields that attract or repel other objects.
28 July 2015, 02:57 AM ET
Folic acid is a synthetic form of folate, also known as vitamin B9. It is commonly prescribed for pregnant women.
27 July 2015, 08:30 PM ET
Properties, sources and uses of the element tin.
24 July 2015, 01:44 AM ET
Static electricity results from an imbalance between negative and positive charges in objects.
23 July 2015, 02:22 AM ET
Bacteria are microscopic single-celled organisms that can be helpful, such as those that live in our guts, or harmful, such as flesh-eating bacteria.
23 July 2015, 02:10 AM ET
Vitamin B5, also called pantothenic acid and pantothenate, is vital to living a healthy life. Like all B vitamins, it helps the body turn food into energy.