1. Excretion is the process in which all metabolic wastes are passed out of the body. Excretion in humans occurs in several processes through various organs and internal organs of the body.

2. Diffusion is the most common process of excretion in lower organisms. The human body is an extraordinary machine, where various life-processes (respiration, circulation, digestion, etc.) occur simultaneously. As a result, many of the waste products produced in our bodies are in various forms including carbon dioxide, water, and nitrogenous products such as urea, ammonia, and uric acid.

The Amazon rainforest is the largest tropical rainforest in the world. The Amazon is the largest rainforest in the world. It is home to more than 30 million humans and one in ten known species in the world. The Amazon rainforest covers a vast area of 6.7 million square kilometres.