Answer:
Pericardial sac has protective tole
Explanation:
Pericardial sac or pericardium is a fibrous tissue that surrounds the heart. It has two coats:
- the outter coat-parietal pericardium
- the inner coat-visceral pericardium or epicardium which is double-layered and contains pericardial fluid between those two layers (pericardial fluid is necessary as a lubricant for the heart movement).
Besides lubrication, percardium also protects heart from infections, fixes it and limits its movements.
Explanation:
HIV is a decease that Is caused by sexual intercorse
Explanation:
In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg.
In a small percentage (less than 5%) of cases, the extra copy of chromosome 21 comes from the father through the sperm.
In the remaining cases, the error occurs after fertilization, as the embryo grows.
The answer that would best complete the given statement above is the term NICHE. Each specie has a role in an ecosystem to make it balanced. And an example of this is when s<span>mall monkeys and squirrels both eat nuts and live in tree tops. Hope this answers your question.</span>
Explanation:
<em>Characteristics</em><em> </em><em>are</em><em> </em><em>as</em><em> </em><em>under:</em>
<em>1</em><em>.</em><em> </em><em>Living</em><em> </em><em>things</em><em> </em><em>respire.</em><em>.</em><em>.</em>
<em>2.</em><em> </em><em>Living </em><em>things</em><em> </em><em>can</em><em> </em><em>move</em><em>.</em><em>.</em>
<em>3</em><em>.</em><em> </em><em> </em><em>M</em><em>a</em><em>de </em><em>uo</em><em> </em><em>of</em><em> </em><em>cells</em><em>.</em><em>.</em>
<em>4</em><em>.</em><em> </em><em>Can</em><em> </em><em>Reproduce</em><em>.</em><em>.</em>
<em>5</em><em>.</em><em> </em><em>They</em><em> </em><em>carry</em><em> out</em><em> </em><em>various</em><em> </em><em>Life</em><em> </em><em>pr</em><em>o</em><em>cesses.</em><em>.</em><em>.</em>
