Deciduous trees start to shed their leaves at the start of Autumn.
In the atmosphere<span>, </span>carbon<span> is attached to oxygen in a gas called </span>carbon<span> dioxide (CO</span>2<span>). With the help of the Sun, </span>through<span> the process of photosynthesis, </span>carbon<span>dioxide is pulled from the air to make plant food from </span>carbon<span>. </span>Through<span> food chains, the </span>carbon<span> that is in plants </span>moves<span> to the animals that eat them.
Learn More At: </span>http://www.windows2universe.org/earth/Water/co2_cycle.html
Answer:
Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.
OR
The blood becomes oxygenated in the lungs. Oxygenated blood leaves the lung via the pulmonary vein. Blood moves into the left ventricle. Blood is pumped into the aorta, which carries oxygenated blood around the body.
Answer:
I think it might be C. .......
Explanation:
