Question

1. Fill in the blanks:
i)
... is called the primary pacemaker of the heart.
ii)
People with blood group AB are called universal ..............
...fluid is present in the ventricles of brain.
iv) The midbrain,pons and medulla oblongata together makeup the.
v) ......action does not involve conscious thought.​

Answer 1

Answer:

I.sinoatrial node

2.recipient

3.cerebrospinal fluid

4.I dont know

5.reflex action