According to About.com, water makes up between 65 and 90 percent of all cells in the human body. The remaining elements by mass include oxygen, carbon, hydrogen, nitrogen, calcium, phosphorus, potassium, sulfur, chlorine, sodium, magnesium and trace amounts of iron, cobalt, copper, zinc, iodine, sel
Humans have many body parts including 206 bones and more than 600 muscles. Scientists discovered a new body part, a ligament in the knee now called anterolateral ligament in 2013 at the University of Leuven in Belgium.
Food is needed by the human body for energy, to repair and build cells and to prevent sickness and heal from it. While it is possible to obtain nutrients in a scientifically controlled manner, common food is the most efficient way of obtaining energy and nutrients.
Anatomists enumerate about 22 organs in the human body. Mainstream science designates five vital organs, including the brain, heart, kidneys, liver and lungs. Some educators raise the count of vital organs to ten, adding the pancreas, reproductive organs, stomach, small intestine and large intestine
According to a National Geographic article, the best available estimate of the number of cells contained in the human body is 37.2 trillion. The researchers who conducted the study added up the estimates for the total number of each type of cell to arrive at the total estimate.
The American Association of Anatomists explains the "Terminologica Anatomica" lists more than 7,500 named, human body parts in Latin, as of November 2014. The list of human body parts includes dozens of organs, more than 200 bones, hundreds of muscles, nerves, blood vessels and microscopic structure
The brain is important in the human body because it allows a person to think, feel and store memories, and it controls and coordinates the body’s actions and reactions, states the Atlanta Brain and Spine Care. The brain is an incredibly complex organ composed of many parts, including the cranium, th
According to the Library of Congress, the human body has at least 650 skeletal muscles and as many as 840 depending on what counts as a muscle. Some sources count complex muscles as a single muscle, while others count complex muscles' individual parts as separate muscles, which leads to dissent.
The human respiratory system consists of the nasal cavity, pharynx, trachea, various divisions of the bronchi and two lungs. Air flows through the nose or the mouth into the pharynx, through the trachea, down the right and left bronchi and then through the smaller bronchioles. When it reaches the en
An important buffer system in the human body is the bicarbonate buffering system that keeps human blood in the right pH range. This buffer system is essential, because exercise produces carbon dioxide and lactic acid in muscles.