Heart of Cockroach is

The heart of cockroach has __chambers.

The heart of a cockroach is

Tubular heart of cockroach has how many chambers.

Tubular heart of cockroach has how many chambers ?

Tubular heart of cockroach has how many chambers ?

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____ .

Muscles of alimentary canal, heart of cockroach are controlled by