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Haemolymph contains molecules, ions and cells; [1] regulating chemical exchanges between tissues, haemolymph is encased in the insect body cavity or haemocoel. [ 1 ] [ 59 ] It is transported around the body by combined heart (posterior) and aorta (anterior) pulsations, which are located dorsally just under the surface of the body.
The forelegs are reduced in the Nymphalidae Diagram of an insect leg. The thorax, which develops from segments 2, 3, and 4 of the larva, consists of three invisibly divided segments, namely prothorax, metathorax, and mesothorax. [11] The organs of insect locomotion – the legs and wings – are borne on the thorax.
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 principal cells of the wing used in classification are the discal, anal and second basal cells. The most encountered terms used in Diptera identification keys are:– cell cup. Also called the posterior cubital cell and often called the anal cell. The form of the cell cup is an important character. costal break. These frequently occur ...
A bacteriocyte (Greek for bacteria cell), also known as a mycetocyte, is a specialized adipocyte found primarily in certain insects such as aphids, tsetse flies, German cockroaches, weevils, and ants. These cells contain endosymbiotic organisms such as bacteria and fungi, which provide essential amino acids and other
Stained cells of an insect fat body. Fat body is a highly dynamic insect tissue composed primarily of storage cells.It is distributed throughout the insect's internal body cavity (the haemocoel), in close proximity to the hemolymph as well as organs such as the epidermis, digestive organs and ovaries.
An imaginal disc is one of the parts of a holometabolous insect larva that will become a portion of the outside of the adult insect during the pupal transformation to the imago. [1] Contained within the body of the larva, there are pairs of discs that will form, for instance, the wings or legs or antennae or other structures in the adult.
Schematic cross-section of an insect bristle sensillum. Each bristle is composed of a hair with its base fixed to the dendrite of a sensory neuron. The hair acts as a lever that exerts force on the dendrite, inducing mechanotransduction channels to open and producing electrical currents. Bristle sensilla on the edge of a fruit fly wing.