How many sternites are there in cockroach?

(a) Each abdominal segment is covered with 4 sclerites :dorsal tergum, ventral sternum and two lateral pleura. (b) There are 10 terga and nine sterna in the abdomen of cockroach .

How many sclerites are there?

(4) Body is divided into head, thorax and abdomen. Head is derived by the fusion of six embryonic segments. The part of head between and behind the eyes is epicranium (vertex). The front of head capsule is made up of three unpaired flattened sclerites called frons, clypeus and labrum.

What is Tergum and sternum in cockroach?

The body of an arthropods like cockroach is covered by exoskeleton called sclerites. The exoskeleton (sclerites) on the dorsal surface is known as Tergum plural Terga and the exoskeleton rings present on the ventral side is called Sternum plural sterna.

Why cockroach blood is white?

Thus, in the cockroach, the hemolymph is colorless. The blood of the cockroach does not carry oxygen and also they don’t have vessels. So the blood of cockroaches can be said to be colorless or white as well.

How many terga are present in cockroach?

(a) Each abdominal segment is covered with 4 sclerites :dorsal tergum, ventral sternum and two lateral pleura. (b) There are 10 terga and nine sterna in the abdomen of cockroach .

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How many Tergum does a cockroach have?

Every tegmina of a cockroach has sclerites which are analogous to the bones of humans. Every abdominal segment of cockroach consists of two lateral sclerite plates called pleura along with a dorsal terga and a ventral sterna.

What is the function of the head of a cockroach?

Another structure on the head, is a pair of long, well-developed antennae, sensory organs used to detect odors and vibrations in the air. Inside the head is a small brain which coordinates the various body functions. Figure 2-2. German cockroach life cycle, similar to other cockroach species.

How is brood pouch formed in female cockroach?

The brood pouch is formed by the union of-7, 8, 9 sternae in the female cockroach. In the anterior part of the genital pouch, gonopores, spermathecal pores and collateral gland openings are present. The genital pouch is found in the male cockroach between the 9th and 10th terga and the 9th sterna.

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