AP BIOLOGY

Detailed explanation-1: -The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism. See below Figure 1.1. 1 .

Detailed explanation-2: -The human body has many levels of structural organization: atoms, cells, tissues, organs, and organ system. The simplest level is the chemical level, which includes tiny building blocks such as atoms.

Detailed explanation-3: -The most complex level of organization is the organismal level, where all eleven organ systems function in the human organism, the whole living person.

Detailed explanation-4: -An organism is made up of four levels of organization: cells, tissues, organs, and organ systems. These levels reduce complex anatomical structures into groups; this organization makes the components easier to understand.