Final answer:
Cockroach body cells excrete nitrogenous waste in the hemolymph primarily as uric acid, facilitated by the Malpighian tubules for water conservation and less toxicity.
Step-by-step explanation:
The body cells in a cockroach excrete nitrogenous waste into the hemolymph mainly in the form of uric acid, not nitric oxide. This process is a part of the excretory system of many insects, which is crucial for regulating their internal chemical environment. Uric acid is a purine catabolic product and is less toxic than other nitrogenous wastes like ammonia.
Insects, including cockroaches, use a system of Malpighian tubules to filter the hemolymph (equivalent to blood in higher animals) and facilitate the removal of solutes and nitrogenous wastes. Uric acid being insoluble in water, allows insects to conserve water and is an adaptation suitable for their terrestrial habitats. This way, they can excrete waste without losing much water, which is particularly valuable in arid environments.
Thus, when discussing the nitrogenous waste in the hemolymph of a cockroach, uric acid is the correct form, defining a key aspect of insect physiology and adaptations that enables them to thrive in various environmental conditions.