The answer is A. And if you are from connections Academy 7th grade science it's
1. A
2. C
3. B
4. D
5. A
<h2>Pericardium </h2>
Explanation:
Pericardium is the fibrous tissue that surrounds the heart and the roots of the great blood vessels
The pericardium's outer coat is called the parietal pericardium which is tough and thickened, loosely cloaks the heart, and is attached to the central part of the diaphragm and the back of the breastbone
Its inner coat is called the visceral pericardium or epicardium which is double, with one layer closely adherent to the heart and the other lining the inner surface of the outer coat
The intervening space between these layers is filled with pericardial fluid
This small amount of fluid acts as a lubricant to allow normal heart movement within the chest
Send signals towards the CNS
Ascaris is a type of parasitic nematode worm that inhabits the small intestine of its host, which includes humans. The intestine can be a harsh environment for biological material as it is alkaline and contains enzymes to facilitate the break down and absorption of nutrients. The presence of a <span>cuticle can act as a physical barrier, protecting the parasite from these elements.</span>
