Four chambered heart keeps oxygenated and deoxygenated blood separate and has double circulation while three chambered heart has a single circulation. Two chambered heart only has single atrium and single ventricle
Answer:
air pollution can irritate your airways and may cause shortness of breath, coughing, wheezing, asthma episodes and chest pain.
Explanation:
Hope this helps:)
The third answer because I was taught this information
A characteristic one has. It could be appearance or personality
