What is Sinus arrhythmias ?

Given below are three statements (I -IV) regarding the human blood circulatory system . (I) In the treatment of angina pectoris nitrous oxide and nitro glycerin are used. (II) veins have thinner walls and broader lumen than arteries . (III) Artificial pacemakers are used in arrhythmia. How many of the above are correct statements ?

Given below are three statements (I -IV) regarding the human blood circulatory system . (I) In the treatment of angina pectoris nitrous oxide and nitro glycerin are used. (II) veins have thinner walls and broader lumen than arteries . (III) Artificial pacemakers are used in arrhythmia. How many of the above are correct statements ?

What is sinus venosus?

What is hypothesis? What are variables?

What is magnetism and what is magnet ?

What is Chloriosis? What is responsible for it?

What is cryptorchism? What is the solution for this?

What is Perivisceral sinus?