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A tergum (Latin for "the back"; pl.: 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'. A given tergum may be divided into hardened plates or sclerites commonly referred to as tergites. [1]
The four principal regions of an insect body segment are the tergum or dorsal, sternum or ventral, and the two pleura or laterals. Hardened plates in the exoskeleton are called sclerites, which are subdivisions of the major regions – tergites, sternites, and pleurites, for respective regions tergum, sternum, and pleuron.
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.
Ahead, entomologists explain why you don't really need to worry about cockroach bites—but rather how they can make you sick if you have an infestation. Ahead, entomologists explain why you don't ...
Indirect flight muscles are attached to the tergum and sternum. Contraction makes the tergum and base of the wing pull down. In turn this movement lever the outer or main part of the wing in strokes upward. Contraction of the second set of muscles, which run from the back to the front of the thorax, powers the downbeat. This deforms the box and ...
The first sting is directed at nerve ganglia in the cockroach's thorax, temporarily paralyzing the victim for a few minutes – more than enough time for the wasp to deliver a second sting. The second sting is directed into a region of the cockroach's brain that controls the escape reflex, among other things. [ 1 ]
Chigger bites vs. bed bug bites Chigger and bed bug bites may look similar to the naked eye. They both feed off humans and can leave a trail of bumps on your skin. This can cause itchiness and ...
The American cockroach (Periplaneta americana) is the largest species of common cockroach, and often considered a pest. In certain regions of the U.S. it is colloquially known as the waterbug, [1] though it is not a true waterbug since it is not aquatic. It is also known as the ship cockroach, kakerlac, and Bombay canary. [2]