Depression or being alone with someone of the opposite or same sex for longer than like 10 minutes
That statement is True
Over the past waters, the Eastern Europeans always have problems in obtaining clean fresh water
Not only it's scarce, but also filled with waste water, municipal, and industrial waste, which very dangerous for one's health
A medicine containing codeine would be used to stop a cough.
This drug is often found in cough medicine, and it is used in order to treat pain, and heal sore parts of your body, especially your inner throat. Although it can have some side effects, it is generally safe to use for anyone above the age of twelve, at least in Europe.
Answer:
Lumen corresponds to the central opening of a vessel (option d).
Explanation:
From the biological point of view, lumen is the internal space of any structure or tubular organ, whose purpose is the conduction of substances through it.
In the case of blood vessels, the lumen is a central space covered by a simple epithelium, called the endothelium, which ensures the passage of blood in a fluid form.
The other options do not correspond to the answer:
<em> a. </em><u><em>Vessel that empties into the right atrium</em></u><em> is the vena cava</em>
<em> b. </em><u><em>Fibrous sac around the heart </em></u><em>is the pericardium.
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<em> c. </em><u><em>Structure that keeps fluid moving forward</em></u><em>, it is a blood vessel.
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<em> e. </em><u><em>Lower, pointed region of the heart</em></u><em>, corresponds to the cardiac apex.</em>