Read the given statements about blood vascular system of cockroach
I. Circulatory system of cockroach is of closed type
II. It contains no blood vessels except aorta heart
III. Heart is 6 chambered
IV. The haemolymph is composed of colourless plasma and haemocytes
Which of the statements given above is/are incorrect
Read the given statements reference to the digestive system of cockroach
I. Alimentary canal is divided into three regions
II. Oesophagus opens into a sac like structure called crop
III. The hind gut is broader than mid gut
IV. The rectum opens through the anus
Which of the statements given above is/are incorrect?