Fill in the blanks :
(i) Left auriculoventricular aperture is guarded by ____ valve while right auriculoventricular aperture is guarded by _____ valve.
(ii) The human heart consists of ____ chambers while the fish heart has___ chambers.
(iii) In man left auricle receives ___ blood by ____ pulmonary veins.
(iv) Heart of cockroach has___ funnel shaped, segmentally arranged chambers. In each segment, a pair of _____ muscles is present on the either side of the heart.
(v) An abnormal rise in R.B.C. count is called ____ and that of W.B.C. count is called____ .