The human body is the entire structure of a human being and comprises a head, neck, trunk (which includes the thorax and abdomen), two arms and hands and two legs and feet. Every part of the body is composed of various types of cell. At maturity, the estimated number of cells in the body is given as 37.2 trillion. This number is stated to be of partial data and to be used as a starting point for further calculations. The human body involves anatomy and physiology. Many systems and mechanisms interact in order to maintain homeostasis.
Structure.Height is largely determined by genes and diet. Body type and composition are influenced by factors such as genetics, diet, and exercise.
The main elements that compose the human body are shown from most abundant to least abundant.The average adult body contains between 5 and 5½ litres of blood. The composition of the human body can be referred to in terms of its water content, elements content, tissue types or material types. The adult human body contains approximately 60% water, and so makes up a significant proportion of the body, both in terms of weight and volume. Water content can vary from a high 75% in a newborn infant to a lower 45% in an obese person. (These figures are necessarily statistical averages).Composition by tissue type can refer to the cells of the human body where the vast majority of cells are not human but bacterial cells and also archaea cells, whole population of microbiota include microorganisms of the skin and other body parts and these in total are also termed the human microbiome the largest proportion of these form the gut flora.
The proportions of the elements of the body can be referred to in terms of the main elements, minor ones and trace elements. Material type may also be referred to as including water, protein, connective tissue, fats, carbohydrates and bone.
Generally, physicians, dentists, physiotherapists, nurses, paramedics, radiographers, and students of...