Question

question 18 pericardium- thick membrane surrounding heart carry blood toward the heart (oxygen poor blood) separates the abdominal cavity from the lungs and heart. contraction of the which forces air into the lungs carry blood away from the heart (oxygen rich blood)

Explanation:

The pericardium is a double - walled sac that surrounds the heart. It has a fibrous outer layer and a serous inner layer. Its main function is to protect the heart.

• The option "Thick membrane surrounding heart" correctly describes the pericardium.
• "Carry blood toward the heart (oxygen - poor blood)" describes veins.
• "Separates the abdominal cavity from the lungs and heart. Contraction of the which forces air into the lungs" describes the diaphragm.
• "Carry blood away from the heart (oxygen - rich blood)" describes arteries.

Answer:

Thick membrane surrounding heart