| Beschreibung: | VP 4786826,
Head and thorax of a female body louse (Pediculus humanus corporis), colorized SEM (ventral view, x 76). The paw of the insects is constituted of five segments : coxa (hip), trochanter, femur, tibia and tarsus. Among certain insects, such as the louse, a sixth segment, terminal is present : pretarsus (or arolium), consisting of a claw. This claw enables the louse to hold on to clothes. Body louse (Pediculus humanus corporis) > Pediculus humanus > Pediculid > Louse > Phthiraptera > Insect > Arthropod > Animal. This was one of five scanning electron micrographic (SEM) images successively magnified at higher and higher values, which focused on the head region of a female body louse, Pediculus humanus var. corporis from a ventral perspective. At a relatively low magnification, this SEM revealed some of the insects exoskeletal morphology exhibited by its cephalic, or head region, thoracic, and proximal abdominal regions. Of interest is the jointed configuration of its six extremities, from which it derived its classification in the phylum of Athropoda, i.e., Arthro from joint , and poda from leg ). Also note the sensorial hairs known as setae, which really arent hairs at all, but chitinous exoskeletal extensions, unlike mammalian hairs, which are made up of keratin, and make mammals unique in this regard. What are body lice? Body lice are parasitic insects that live on the body and in the clothing or bedding of infested humans. Infestation is common, found worldwide, and affects people of all races.
[Urhebervermerk: CDC/ JANICE CARR/BSIP/vario images]
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