Head louse (Pediculus humanus capitis), about 3 mm in length, positioned next to U.S. 25-cent piece to show its relative size. Blood can be seen in its digestive tract. Lice are wingless, parasitic insects that spend their entire lives on the scalps of their human hosts. Their mouthparts, which are only visible when feeding, are adapted for piercing skin and sucking blood. The claws on their feet are used for grasping strands of hair. | |
Licence : | Droits gérés |
Crédit : | Science Photo Library / Matulavich, Peter |
Model Release : | Non requis |
Property release : | Non requis |
Durée : | 14 Secondes |
Aspect ratio : | 16/9 |
Restrictions : | - |