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 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 terga and sternum in cockroach?
Solution. Tergum: 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 does Notum mean?
Definition of notum
: the dorsal surface of a thoracic segment of an insect.
What is tergum in insect?
A tergum (Latin for “the back”; plural terga, associated adjective tergal) is the dorsal (‘upper’) portion of an arthropod segment other than the head. The anterior edge is called the ‘base’ and posterior edge is called the ‘apex’ or ‘margin’.
What is tergum sternum and pleura?
The dorsal plate is named tergum or tergite or notum, the ventral plate sternum or sternite, the lateral pleura. … Here, the endoskeleton forms internal dorsal processes called phragmata, to which the extrinsic muscles of wings attach.
What does Tergite mean?
Definition of tergite
: the dorsal plate or dorsal portion of the covering of a metameric segment of an arthropod especially : one on the abdomen.
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 .
Where are sclerites present in cockroach?
In each segment of cockroach , exoskeleton has hardened plates termed sclerites.
Where is 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.
What connect the terga sterna and pleura of the cockroach body?
Arthrodial membrane is a tough, flexible cuticle that joins the skeletal elements of cockroach and other arthropods. It connects terga, pleura and sterna of cockrocah body.
Which sternum is boat shaped in female cockroach?
The 7th sternum is boat-shaped and an 8th and 9th sternum together forms a genital pouch.
What is nodal person?
NODAL PERSON means a person who shall be contacted by purchaser staff for support in case of any fault in any instrument needs to be attended by repair center/ technician of the OEM.
What is Alinotum?
Definition of alinotum
: the dorsal plate of the thoracic exoskeleton of a winged insect to which the wings are attached.
What is the function of Notum?
Notum function was recently re-defined as a carboxylesterase that cleaves an essential Wg lipid moiety (palmitoleic acid attached to conserved serine), leaving it unable to bind to Fz2 and activate downstream signaling (Kakugawa, 2015).
What is the function of thorax in insects?
The thorax is the midsection (tagma) of the insect body. It holds the head, legs, wings and abdomen. It is also called mesosoma or cephalothorax in other arthropods.
Which wing is present in beetle?
Beetle wings are composed of a forewing (also known as elytron) and a hind wing. The elytra are rigid. A beetle’s functional wings, which allow flying, are the hind wings.
What is Sterna in cockroach?
“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.
What is Arthrodial membrane?
Arthrodial membrane is the tough flexible cuticle that occurrs between skeletal elements in insects and help in relative movement.
What is the pleural membrane?
The pleura is a serous membrane which folds back onto itself to form a two-layered membrane structure. The thin space is known as the pleural cavity and contains a small amount of pleural fluid (few milliliters in a normal human). The outer pleura is attached to the chest wall (1-9).
What is pleural sulcus in insects?
The pleuron (pl. pleura, from Greek side, rib) is a lateral sclerite of thoracic segment of an insect between the tergum and the sternum. The terms pro-, meso- and metapleuron are used respectively for the pleura of the first, second and third thoracic segments.
What does Ventrally mean?
Medical Definition of ventral
1 : of or relating to the belly : abdominal. 2a : being or located near, on, or toward the lower surface of an animal (as a quadruped) opposite the back or dorsal surface. b : being or located near, on, or toward the front or anterior part of the human body.
What is articular in English?
articular in British English
(ɑːˈtɪkjʊlə ) adjective. of or relating to joints or to the structural components in a joint.
What is articular membrane?
Definition of articular membrane
: a region of flexible unsclerotized cuticle between areas of sclerotization in the exoskeleton of an arthropod that functions as a joint permitting movement of the body or its parts.
How many Sterna are visible in male and female cockroaches?
Hint: In cockroaches, both male and female abdomen consists of 10 segments. In males, accessory reproductive glands are called mushroom glands present on the sixth and seventh segment. The number of visible sterna in male cockroaches is two more than that of the female cockroaches.
How many Sclerites are there in head of cockroach?
The front of head capsule is made up of three unpaired flattened sclerites called frons, clypeus and labrum.
Which type of development occurs in periplaneta?
It is a periodic phenomenon. The cockroach nymph undergoes ecdysis almost 13 times to metamorphose into an adult. This type of development is known as paurometabolous development. Therefore, the correct answer to this question is paurometabolous.
What is the function of sclerites in cockroach?
Sclerites are known to cover the complete body of the cockroach. These are thick chitinous plates which are dark-brown in color. They help in organizing the exoskeleton. The dorsal sclerites are known as the terga while the ventral sclerites are known as the sterna and lateral sclerites are known as the Pleura.
Which membrane helps join the sclerites in cockroach?
The cockroach’s whole body is enclosed by a chitinous, rigid exoskeleton. The exoskeleton has hardened plates in each segment, called sclerites, which are joined by a thin and flexible articular membrane known as the arthrodial membrane. So, the correct answer is, ‘Arthrodial membrane’.
What is the role of Alary muscles in cockroach?
(d) 7. Hint: Alary muscle in cockroaches occurs in the heart wall and it helps in blood circulation. Alary muscles are associated with the blood vascular system of cockroaches.
What does a sternum look like?
The shape of the sternum looks somewhat like a sword pointing downwards, with the manubrium forming the handle, the body forming the blade, and the xiphoid process forming the tip. In fact, the name manubrium means “handle,” gladiolus means “sword,” and xiphoid means “sword-shaped.”
What organs are under the sternum?
- The medulla is the inside part of the thymus.
- The cortex is the layer that surrounds the medulla.
- The capsule is the thin covering over the outside of the thymus.
Is sternum pain serious?
While sternum pain is not usually serious, there are some causes of sternum pain that require immediate medical attention. A person should seek emergency medical attention if the pain: started as a result of direct trauma. is accompanied by heart attack symptoms.
Where are sperms stored in cockroaches?
In cockroaches, the sperm are stored in the seminal vesicles which is a part of the reproductive system of the cockroach. In seminal vesicles, the sperms are glued together in the form of bundles which are known as spermatophores, and discharged during copulation.
What is Tegmina in cockroach?
A tegmen (plural: tegmina) designates the modified leathery front wing on an insect particularly in the orders Dermaptera (earwigs), Orthoptera (grasshoppers, crickets and similar families), Mantodea (praying mantis), Phasmatodea (stick and leaf insects) and Blattodea (cockroaches).
Which type of vision is found in cockroach?
Answer: The two types of vision in a cockroach are mosaic vision or apposition and superposition or dull vision.
In which segment of cockroach appendages are absent?
In cockroaches, prothorax is the anterior segment of the thorax of an insect and this segment does not bear any wings.
Which structure is known as lower lip of cockroach?
Labrum – Labium is the lower lip of the mouth of the insect.
How many malpighian tubules does a male cockroach have?
100-150 Malpighian tubules are present in cockroach.
What is nodal gene?
Nodal is a secretory protein that in humans is encoded by the NODAL gene which is located on chromosome 10q22.1. … In addition, Nodal seems to have important functions in neural patterning, stem cell maintenance and many other developmental processes, including left/right handedness.
What’s a nodal town?
Nodal Town. The motivation to create nodes within the town limits allows concentrated development at strategic points. This allows the town the opportunity to acheive a number of goals: create a more distinctive sense of place, safeguard primary spans of open. Creating a ‘Nodal Town’
Nodal Officer means an officer of the Company nominated by the Board to receive protected disclosures from whistle blowers, maintaining records thereof, placing the same before the Audit Committee for its disposal and informing the whistle blower the result thereof.