Same chapter3 marksDifficulty: Medium
Name the types of epithelial tissue and state where each is found.
Structural Organisation in Animals
3 marksDifficulty: Medium
Describe the circulatory system of the cockroach.
Original Khojo Papers practice question — not from a past board paper.
Answer
The cockroach has an open circulatory system. The blood, called haemolymph, is colourless and consists of plasma and haemocytes, and it bathes the organs directly in the haemocoel. The heart is a long tube of thirteen chambers lying along the mid-dorsal line of the thorax and abdomen, and it drives the haemolymph forwards.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The haemolymph carries no respiratory pigment, because respiration is by tracheae directly.
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