Invertebrate Zoology

Cockroach is an animal with three pairs of legs. It can walk with the help of its legs. It can climb up the walls and can also undergo short flights due to the presence of wings, which are attached to its breast.

Cockroaches have 3 pairs of legs.

Book lungs are a unique type of respiratory organs that are used for atmospheric gaseous exchange in spiders.

Praws have gills (special gas exchange surfaces) at the base of each walking leg.

Spiracles are tiny tubes or openings alongside the insect's body, which allow it to receive air.

The first body segment is called the peristomium (buccal segment) which contains the mouth.

A single female genital pore is present in the midventral line of 14^th segment.

The characteristic feature of the intestine between 26-35 segments is the presence of internal median fold of dorsal wall called typhlosole.

A pair of male genital pores are present on the ventro-lateral sides of the 18^th segment.

At the junction of midgut and hindgut another ring of 100-150 yellow coloured thin filamentous Malpighian tubules is present.

Integumentary nephridia, attached to the lining of the body wall of segment 3 to the last that open on the body surface.

The development of P. americana is paurometabolous, meaning there is development through nymphal stage.

Housefly belongs to order Diptera. Primata is an order of phylum Chordata.

Labial comes under Antennapedia complex.

Antennapedia complex determines head and anterior thorax.