Before you start to think about the diverse structures and elements of the human body, it is useful to think about its essential design; that is, the way its littlest parts are gathered into bigger structures. It is helpful to consider the structures of the body as far as central levels of association that expansion in many-sided quality: subatomic particles, iotas, atoms, organelles, cells, tissues, organs, organ frameworks, life forms and biosphere
The Levels of Organization
To think about the substance level of association, researchers consider the least complex building pieces of issue: subatomic particles, iotas and atoms. All issue in the universe is made out of at least one of a kind unadulterated substances called components, natural cases of which are hydrogen, oxygen, carbon, nitrogen, calcium, and iron. The littlest unit of any of these unadulterated substances (components) is a particle. Iotas are comprised of subatomic particles, for example, the proton, electron and neutron. At least two iotas consolidate to shape an atom, for example, the water particles, proteins, and sugars found in living things. Atoms are the substance building pieces of all body structures.
A cell is the littlest freely working unit of a living being. Indeed, even microscopic organisms, which are to a great degree little, autonomously living life forms, have a cell structure. Every bacterium is a solitary cell. Every single living structure of human life systems contain cells, and all elements of human physiology are performed in cells or are started by cells.
A human cell regularly comprises of adaptable layers that encase cytoplasm, a water-based cell liquid together with an assortment of small working units called organelles. In people, as in all life forms, cells play out all elements of life. A tissue is a gathering of numerous comparative cells (however some of the time made out of a couple of related kinds) that cooperate to play out a particular capacity. An organ is an anatomically unmistakable structure of the body made out of at least two tissue writes. Every organ performs at least one particular physiological capacities. An organ framework is a gathering of organs that cooperate to perform real capacities or address physiological issues of the body.
This book covers eleven particular organ frameworks in the human body (Figure 2 and Figure 3). Allocating organs to organ frameworks can be uncertain since organs that “have a place” to one framework can likewise have capacities essential to another framework. Truth be told, most organs add to in excess of one framework.