Answer:
The sympathetic nervous system is responsible for the fight or flight response.
Explanation:
The pericardial cavity has a pericardial fluid, which lubricates heart and prevents it from infection. The cavity is enclosed in a pericardial sac made up of two layers: fibrous layer and serous layer. Inside this pericardium, is the heart and its roots. In this accidental case, the heart is damaged due to breakage of the pericardium.
Protection used during sex so neither party is infected with such like an STD.
No bacteria grows over time and it would depend on what’s on the sandwich