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Insects, like all arthropods, have no interior skeleton; instead, they have an exoskeleton, a hard outer layer made mostly of chitin that protects and supports the body. . The insect body is divided into three parts: the head, thorax, and abdomen
In some insect pupae, like the mosquitoes', the head and thorax can be fused in a cephalothorax. Members of suborder Apocrita (wasps, ants and bees) in the order Hymenoptera have the first segment of the abdomen fused with the thorax, which is called the propodeum .
Physogastrism or physogastry is a characteristic of certain arthropods (mostly insects and mites), where the abdomen is greatly enlarged and membranous. The most common examples are the "queens" of certain species of eusocial insects such as termites, bees and ants, in which the abdomen swells in order to hold enlarged ovaries, thus increasing fecundity.
An insect uses its digestive system to extract nutrients and other substances from the food it consumes. [3]Most of this food is ingested in the form of macromolecules and other complex substances (such as proteins, polysaccharides, fats, and nucleic acids) which must be broken down by catabolic reactions into smaller molecules (i.e. amino acids, simple sugars, etc.) before being used by cells ...
the interior of the insects anatomy, including all organs and hemocyte. hemocyte or haemolymph a fluid in the circulatory system of insects containing nutrients, fat, water, etc. hemophagy feeding on blood. herbiphagy feeding on herbaceous plants. hindwing (Anatomical feature) the pair of wings of a four-winged insect furthest from the head ...
Thoracic and abdominal sterna of a beetle. A Mesosternum, B Metasternum, 1 first abdominal sternite, 2-6 rest of sternites. 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.
Lepidopteran insects feature a cloaca at the end of the abdomen. This may be complete, incorporating the anus , the ovipore and the copulatory pore , as in the case of the Dacnonypha , Zeugloptera and the majority of the Monotrysia ; or incomplete, incorporating the anus and ovipore only, as found in some of the Monotrysia, the Psychidae , and ...
In the worker ant, the abdomen consists of the propodeum fused to the thorax and the metasoma, itself divided into the narrow petiole and bulbous gaster. In insects, the abdomen contains the insect's digestive tract and reproductive organs. It consists of eleven segments in most orders of insects, though the eleventh segment is absent in the ...