https://humanbodyanatomy.co/parts-of-the-body-anatomy/parts-of-the-body-anatomy-anterior-and-posterior-parts-of-the-body-anatomy-human-anatomy-chart/
this link has a picture with the posterior region.
Every cell in your body has the same genes/DNA but, the gene expression process decides which genes are active in which cells which is how each cell type gets it properties.
Answer: Those parts is were all the oxygen is distributed through the human body, and so technically it can be considered the respiratory system.
Answer:
Go through G♦♦gle that's all