GENERAL HISTOLOGY

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.

Detailed explanation-2: -Six general levels of the organization listed from smallest to largest are chemical, cellular, tissue, organ, organ system, and organism levels. Chemicals are regarded to be the smallest and lowest unit of organization in a living system, ranging from the smallest atoms to the largest macromolecules.

Detailed explanation-3: -The level of cellular organization, from smallest to most complex, is cells, tissues, organs, organ systems, and organisms.

Detailed explanation-4: -There are also levels of organization above the individual organism: population, community, ecosystem, biome and biosphere.

Detailed explanation-5: -∙ So, the correct order is: Cell → Tissue → Organ → Organ system → Organism.