Parasitism and autotrophism
The heart receives its blood supply from the coronary arteries. The two main coronary arteries branch off the trunk of aorta close to the aortic va;ve. Coronary arteries receives blood from aorta during diastole when ventricles are resting. Right coronary artery extends to the right and perfuses the right atrium and right ventricle. The SA node is perfused by RCA in approximately 55% and AV node supplied by RCA in 90% of populatio. The remaining percent is supplied by left circumflex.
Global Warming: Global warming is a gradual increase in the Earth's temperature over time.
Greenhouse Effect: The greenhouse effect causes the Earth to be colder than usual,and the gases polluting the air build up and form a thick layer of substances which trap the sun's radiation.
Gases: Certain gases such as Carbon Dioxide, CFC's and many more, cause the Earth to become warmer.
Littering: Littering pollutes the Earth's air, making a build up of gases stronger, which could lead to the temperature's rising too high in the near future.
Photosynthesis: Photosynthesis is a process where plants use a process of water and carbon dioxide to make food, and to grow and release oxygen into the Earth's atmosphere.
Hope this helps! x
