D neither a nor b is right
Answer:
I am not for sure about this question.
Explanation:
The layer that encloses and protects the heart is
Pericardium
Answer:
Tachycadia
Explanation:
Angina Pectoris is a medical condition that affect the cardio-respiratory system with clinical symptoms of chest tightness, difficulty in breathing, pain along the course of the costo-diaphraghmatic root and also Tachycadia which is increased breathing or difficulty in breathing.