Answer:
<em>The route of entry is absorption.</em>
Explanation:
Hazardous chemicals can enter the body of a person by processes such as inhalation, absorption, ingestion and injection.
If a hazardous chemical, such as sodium hydroxide, enters the body of a researcher through the eyes or through contact with the skin, then such a method of the entrance is termed as absorption. The epidermis and dermis layer of the skin can absorb various chemicals which will then be transferred into the bloodstream.
The answer is
A. The heart is a muscular pump that acts to circulate blood to deliver oxygen all over the body.