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The human body is the entire structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organs and then organ systems. The external human body consists of a head, hair, neck, torso (which includes the thorax and abdomen ), genitals, arms, hands, legs, and feet.
cardiovascular system. endocrine system. (missing exocrine system) muscular system. Clockwise from top left: lymphatic system. respiratory system. urinary system. female reproductive system. male reproductive system.
The circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate. [ 1 ] [ 2 ] It includes the cardiovascular system , or vascular system , that consists of the heart and blood vessels (from Greek kardia meaning heart , and from Latin ...
Regional anatomy is the study of the interrelationships of all of the structures in a specific body region, such as the abdomen. In contrast, systemic anatomy is the study of the structures that make up a discrete body system—that is, a group of structures that work together to perform a unique body function, such as the digestive system. [10]
Nervous system in a human body. There are 11 distinct organ systems in human beings, [ 2] which form the basis of human anatomy and physiology. The 11 organ systems: the respiratory system, digestive and excretory system, circulatory system, urinary system, integumentary system, skeletal system, muscular system, endocrine system, lymphatic ...
Health has a variety of definitions, which have been used for different purposes over time. In general, it refers to physical and emotional wellbeing, especially that associated with normal functioning of the human body, absent of disease, pain (including mental pain ), or injury . Health can be promoted by encouraging healthful activities ...
Endocrine system. The endocrine system[ 1] is a messenger system in an organism comprising feedback loops of hormones that are released by internal glands directly into the circulatory system and that target and regulate distant organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems.
e. Physiology ( / ˌfɪziˈɒlədʒi /; from Ancient Greek φύσις (phúsis) 'nature, origin' and -λογία ( -logía) 'study of') [ 1] is the scientific study of functions and mechanisms in a living system. [ 2][ 3] As a subdiscipline of biology, physiology focuses on how organisms, organ systems, individual organs, cells, and ...