Which of the Following Does Not Participate in Excretion in Cockroaches?

The digestive tract of a cockroach consists of three regions: the anterior ectodermal stomodeum, the midgut, and the posterior endodermal proctodeum. These three regions are lined with a combination of epidermis and sclerotized exoskeleton. They are responsible for mechanical digestion, trituration, and enzyme secretion. In addition, the cockroach excretion system involves a number of other processes, including absorption, enzyme secretion, and water reclamation.

The excretory system in insects is controlled by hormones. This has been demonstrated for bloodsucking insects, where the blood meal causes a brisk flow of urine. This excretion process eliminates most of the water that was consumed in the blood meal. This process also promotes the release of a hormone that promotes a rapid flow of primary urine.

Cockroaches possess large, powerful legs. They have two pairs of paired genae on each thoracic segment. The legs are similar in shape from anterior to posterior. The proximal coxa is large and flat, whereas the tibia and femur are long and have strong spines. The tarsus is made up of five articulated tarsomeres. The fifth tarsomere is equipped with a pair of tarsal claws. Both of these are located immediately ventral to the eyes, and are useful as landmarks in identification.

The American cockroach (Periplaneta americana) is an exotic species that was introduced to North America in the early seventeenth century. This species can grow up to 44 millimeters in length. Its wing span is nearly twice as wide as that of its P. bunnea cousin. This species is the second most common cockroach pest in the United States.

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