In order for the parts in a system to work correctly, the parts must be arranged or built upon in a particular order. What is the correct order of the parts of a human body system from simplest to most complex?

Cell - -> Tissue - -> Organ - -> Organ system - -> Whole Organism

Explanation:

Cell is the simplest, basic and functional unit of life.

Tissue is a collection of similar cells e. g brain tissue

Organ is a collection of similar tissues e. g Liver, Lungs

Organ system refers to a group of closely related organs performing the same function. E. g Digestive system with mouth, salivary gland, small and large intestine etc

Whole Organism refers to a complete living being with well-coordinated organ system. E. g Man