Using a flow chart trace the pathway of blood: 1. Through the pulmonary circulation starting from the right ventricle to the left atrium.
2. Through the heart starting from the left atrium to the pulmonary vein.
Note: it should be flow chart
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the pic attached shows the stages of mitosis. hope it !

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

cell regulation is conducted by special proteins.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).