Deoxygenated blood is carried by pulmonary artery from heart to lungs
Oxygenated blood is carried by pulmonary vein from lungs to heart
Explanation:
Chemical cycling basically helps in defining the structure and dynamics of our ecosystem. It is the flow of chemical elements and compounds between the living organisms and our physical environment. The four major chemical cycles are oxygen cycle, nitrogen cycle, carbon-cycle and water cycle. Chemical cycling can greatly influence climate and weather.
Some solar eclipses are not total. Hope this helps
Atoms with a covalent bond
