The MRI scanner measures this signal difference and displays the activity as a colored area (Figure 1). Diffusion Tensor Imaging (DTI) is a technique that detects how water travels along the white matter tracts in the brain (Figure 2). White-matter tracts connect different parts of the brain and must be protected during surgery. A dye (contrast agent) may be injected into your blood stream.
Quick Answer. Diving bell spiders of the species Argyroneta aquatica have the ability to swim, and they use this adaptation to live underwater. Although they live and swim in the water, diving bell spiders still breathe air by creating air pockets underwater that they use as homes. Continue Reading.
The jumping spider family (Salticidae) contains more than 500 described genera and about 5,000 described species, making it the largest family of spiders with about 13% of all species.Jumping spiders have some of the best vision among arthropods and use it in courtship, hunting, and navigation.Although they normally move unobtrusively and fairly slowly, most species are capable of very agile jumps, notably when hunting, but sometimes in response to sudden threats or crossing long gaps.hen a jumping spider is moving from place to place, and especially just before it jumps, it tethers a filament of silk (or 'dragline') to whatever it is standing on to protect itself if the jump should fail.