Sino-auricular node is called pacemaker of our heart. Why?
Sino-auricular node is called pacemaker, because nerve impulse or wave of contraction starts from it and goes to both auricles. Since the SA node initiates and maintains the rhythmicity of the heart and maintains the pace of the heart beat, it is known as the natural pacemaker of the human body.
Match the following options:
| A. Eosionophils | (i) Coagulation |
| B. R.B.C. | (ii) Universal Recipient |
| C. AB group | (iii) Resist Infections |
| D. AB group | (iv) Contraction of Heart |
| E. Systole | (v) Gas transport |
Why do we consider Blood as a connective tissue?
Describe the evolutionary changes in the pattern of heart among vertebrates.
Why do we call our heart myogenic?
