Answer:
The correct option is : a. serous fluid in the pericardial cavity
Explanation:
The heart is enclosed in a sac containing the heart, known as the pericardium. The pericardium has two layers- fibrous and serous layer.
The serous layer of the pericardium produces and secretes the pericardial fluid into the pericardial cavity.
The pericardial fluid is a lubricating serous fluid present in the pericardial cavity. It reduces the friction caused between the pericardial membranes by lubricating the epicardial surface.
Answer:
nepal have various natural resources that other countries don't have so Nepal is rich in natural resources
Explanation:
nepal is rich in natural resources which are used to make various medicines .
Answer:
Show the story
Explanation:
take a picture of the story