Answer the questions above

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3) Well injection is usually done through the vein because they need the substance to go into the blood.

4) Some people believe that the heart is on the left side because its the left ventricle and atrium responsible and when people hear left they think the heart is on the left.

5) People living in high altitudes don't get as much oxygen so their bodies evolved into carrying ,more RBC so more oxygen is carried into their bodies.

Hope this helps :)

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

a ratio derived from the equality between two different units that can be used to convert from one unit to the other. information obtained from experiments, sometimes called experimental results. the part of the experiment that is affected by the independent variable.