What is Tergum and sternum?

What is Tergum and sternum?

Tergum is the covering each segment of the cockroach on the dorsal side. Sternum: The sternum is the covering of each segment of the cockroach on the ventral side.

What is the function of Tergum?

Tergo-tergal is a stridulatory mechanism in which fine spines of the abdominal tergites are rubbed together to produce sound. This process is known as abdominal telescoping.

What are tergites and Sternites?

Tergite: It is a sclerite (plates that form exoskeleton) present on dorsal side of an abdominal segment in an arthropod. Sternite: It is a chitinous plate present on the dorsal side of an abdominal segment in an arthropod.

What is Tergum in insect?

tergum noun, plural terga – The superior, upper or dorsal portion of a segment (especially of the abdomen), separated from the venter by sutural lines, and divided into segments which are generally, especially in the case of the abdomen, perforated on each side, by the spiracles. May consist of several sclerites.

What is tergum in cockroach?

The cockroach has a dorsoventrally flat, compressed body which is covered by a hard, chitinous exoskeleton. It is in the form of separate plates. The dorsal plate is called tergum and the ventral plate is called sternum. Laterally, the plates are joined by pleura.

What is the location of tergum?

Tergum is a chitinous plate located in the abdomen of a cockroach. The abdomen is elongated and made up of ten segments. Each segment has a dorsal tergum and ventral sternum. Tergum is jointed to the sternum laterally by a soft cuticle called pleura.

What is a sternum in cockroach?

The sternum (pl. “sterna”) is the ventral portion of a segment of an arthropod thorax or abdomen. In insects, the sterna are usually single, large sclerites, and external.

How many sterna does a cockroach have?

(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 sternum do male cockroaches have?

So the correct answer is “Nine”.

How many sterna are visible in male and female cockroach?

So the correct answer is “Seven”.

What are 3 parts of the sternum?

The sternum is a partially T-shaped vertical bone that forms the anterior portion of the chest wall centrally. The sternum is divided anatomically into three segments: manubrium, body, and xiphoid process. The sternum connects the ribs via the costal cartilages forming the anterior rib cage.