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>
3 trimesters taking up 9 months<span />
True
in order to reduce neck aches, eye pain, back pain, etc., it's helpful to your muscles to flex and/or stretch
Answer:
The power gradient is the amount of social distance there is between one person and another. It is the feeling of how much more important people are upwards in the next tier of the hierarchy and how much more important we are than the people below us.
Answer:
Cold boxes are used to collect and transport vaccine supplies from one fixed vaccine store to another, and from vaccine stores to health facilities. They are also used to temporarily store vaccines when the refrigerator is out of order or being defrosted.
