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

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )