Final answer:
The statement that sudden death from cardiac arrhythmia can lead to asystole is true, and the statement that lymphatic vessels form a complete, closed circuit around the body is false.
Step-by-step explanation:
Regarding the statement about sudden death from cardiac arrhythmia culminating in asystole, it is indeed TRUE. Sudden cardiac arrest due to ventricular fibrillation or another serious arrhythmia quickly leads to asystole, which is a state of no electrical activity and no heartbeat. Defibrillation is the treatment for ventricular fibrillation, and it aims to 'reset' the heart's electrical state so that normal rhythms can be restored.
As for the lymphatic system, the statement that lymphatic vessels form a complete, closed circuit around the body is FALSE. Unlike the cardiovascular system, the lymphatic system is not closed and does not circulate lymph fluid in a continuous loop. Instead, it is a network that transports lymph from tissues and returns it to the cardiovascular system without sending it back through the lymphatic system again.