In the first image, those are fake ribs that are attached to the sternum through the costal cartilage
in the second image are real ribs since they are directly attached to the sternum
Systematic separation of the circulation of the blood. The right side of the heart receives oxygen-poor blood from your body and pumps it to the lungs. The lungs oxygenate the blood which returns to the heart and is pumped to the rest of the body by the left side of the heart. After which the blood returns to the right side, completing the cycle of circulation.
Carbon is an element
Oxygen is an element
The most prominent example of carbon fixation is photosynthesis
Abiotic factors are factors that are not caused by the activities of living organism
examples rain, wind, temperature and sunlight
