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The human body consists of biological systems, that consist of organs, that consist of tissues, that consist of cells and connective tissue. The history of anatomy has been characterized, over a long period of time, by a continually developing understanding of the functions of organs and structures in the body.
Online version of Gray's Anatomy – The complete 20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918. Anatomy of the Human Body, 20th US Edition (1918) at LibriVox (public domain audiobooks) First edition of Gray's Anatomy, 1858 (direct PDF link) Gray's Anatomy. 2014. Episode 5 of the BBC TV series The Beauty of Anatomy.
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.
Much of the nomenclature, methods, and applications for the study of anatomy can be traced back to the works of the ancient Greeks. [3] In the fifth-century BCE, the philosopher Alcmaeon may have been one of the first to have dissected animals for anatomical purposes, and possibly identified the optic nerves and Eustachian tubes. [4]
Grasslands and savannas are established, diversity in insects, especially ants and termites, horses increase in body size and develop high-crowned teeth, major diversification in grassland mammals and snakes. 9.5 Ma [dubious – discuss] Great American Interchange, where various land and freshwater faunas migrated between North and South America.
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