The human body is composed mainly of carbon, nitrogen, oxygen and hydrogen, with at least 60 detectable chemical elements. Containing approximately 30-37 billion cells and an equivalent number of microorganisms, the body is 60% water. Cells are fundamental units that structure, absorb nutrients and convert energy, possessing complex internal structures such as cytoplasm, cytoskeleton and various organelles. The basic anatomy includes the head, neck, trunk, limbs and organs grouped into interconnected systems that maintain homeostasis. Cell structures perform critical functions: the cytoplasm influences protein interactions, the cytoskeleton enables movement and cell shape, while organelles such as mitochondria generate energy and lysosomes aid metabolism. Different scientific disciplines - anatomy, physiology, histology and embryology - study the structure, functions and developmental processes of the body, providing a comprehensive understanding of human biological complexity.
O human body is the structure of human being. It is made up of trillions of cellsThe cells, the fundamental unit of life, are responsible for the formation of tissues that protect the organism from the outside world, and several others that are responsible for the formation of internal cavities. The cells group together and form the organsOrgans are structured collections of cells with specific functions. The organs are interconnected and form part of specific systems that maintain the human physical constitution. It also consists of around 60% of water and various elements, approximately 25 kilograms of a human weighing 70 kilograms, are non-human cells or cellular material, one of which is the boneswhich are responsible for supporting and protecting the most important internal structures. The combination of all these factors enables the body to guarantee homeostasis, which is the equilibrium state.
In basic anatomy it is formed by head, neck, trunk (which include chest e abdomen), arms e hands, legs e feet.
The study of the human body involves anatomy, physiology, histology e embryology. The body varies anatomically in known ways. Physiology studies the systems and organs of the human body and their functions. Many systems and mechanisms interact to maintain homeostasis, with safe levels of substances such as sugar and oxygen in the blood.
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