Reason for the body narrowing is not known All Hymenopterans have a thin wasp

Reason for the body narrowing is not known all

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Reason for the body narrowing is not known All Hymenopterans have a thin wasp waist Aorta is coiled in the wasp waist Abdomen lacks external attachments 7 visible abdominal segments consist of overlapping top (tergites) and bottom (sternites) plates Each segment has a pair of spiracles, the openings of the respiratory system connected internally with 3 on the thorax Abdomen is continually moving due to flexible membrane joints Movement is side to side, up and down, in and out Movement aids breathing, digestion, excretion and circulatory function Digestive and excretory system Major internal systems located in the abdomen After food enters the body, it passes through pharynx First section of the abdomen is the honey stomach Not a true stomach because no digestion occurs there Actually a crop Nectar can be regurgitated back into mouth and given to another bee in the hive “Bee spit”
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Behaviour of eating is different than collecting of food Honey stomach is closed by a muscular valve called the proventriculus When the valve opens, food (honey or pollen) passes through to the ventriculus (stomach) Digestion occurs here Digestive tract expands with the posterior intestine, rectum Malphighian tubules = main excretory organs Take waste matter from blood Nervous System 2-part brain w optic and antennal lobes Series of 7 ventral ganglia in the thorax and abdomen Brain coordinated overall functions and has nerve centers for vision, smell, taste, touch Nerves from each ganglion extend to major organs The last ganglion coordinates stinging Headless bees can still walk and sting Circulation Simple - four chambered heart and a single tube (aorta) to carry blood, hemolymph, to the head In the head, the blood is free in the body cavity Sloshes around percolating back to the abdomen, aided by breathing and abdominal movements Blood carries nutrients to body cells and removes cellular waste Carries hormones, blood cells, etc Blood is not red Open circulatory system Reproduction Reproductive organs located in abdomen Worker bee is female Ovaries are undeveloped In queen, reproductive organs are large and occupy a larger amount of space Eggs of mated queens develop in thread-like ovarioles in the ovary and pass to the oviduct where they are fertilized by sperm stored in the bulbous spermatheca Queen places eggs into cells of comb Male drone has testes and a large sperm organ (aedeagus) Highly modified part of reproductive system is the sting Anatomically an ovipositor Most females - ovipositor is used to lay eggs, bUT NOT in honey bee workers Sting glands produce venom and alarm chemical Muscles around sting help drive into victim
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Tiny barbs on 3-part stinging shaft Respiration Insects have 3 thoracic and 7 abdominal air openings, the spiracles Internally many air sacs that lead to branching tubes or trachea Trachea branches into tracheoles Carries oxygen into action site
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  • Fall '12
  • ErnestoGuzman
  • Beekeeping, Honey bee, Honey

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