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>
Answer:
The correct answer is C. independence, marriage, parenting, launching, aging.
Explanation:
The first step in the family cycle is independence. The individuals are struggling to quit the dependence built between them and their parents. By this, we almost always mean finding a job, moving to a new place, finding a partner, etc.
When we all aforementioned circumstances become stable, the couples normally get married and make official their relationship.
The next link in the family chain are children. It is one of the most complex tasks - to be a good parent. Life takes a different direction and now the couple has to focus on raising their kids.
Once the children grow up, it is time for them to leave and become independent, just as their parents did once.
The final stage is aging when things start to slow down and you can enjoy yourself again.
Answer:
1.A warmup gradually revs up your cardiovascular system by raising your body temperature and increasing blood flow to your muscles.
2.Lower risk of injury.
Answer: TRUE the skin is our largest organ
