2007-12-29 10:00:32 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
The tips of the spider's legs have two or three small claws that are used for climbing or grasping the spider’s silk thread. Many ground spiders have specialized adhesive hairs beneath their claws, known as claw tufts or scopulae. These claw tufts enable the spiders to walk surefootedly on smooth, vertical surfaces—even upside down on glass.
Each individual scopula hair splits into thousands of tiny extensions known as end feet. These end feet increase the number of contact points of the spider's foot with the wall surface, creating great adhesion. This is similar to the adhesion of skinks and geckos, which can also walk on ceilings with ease. The scopulae can be raised or laid flat by hydraulic pressure through blood pressure changes just like other erectile organs.
Image of foot
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6X1J-4CCCNYB-R&_user=10&_coverDate=06%2F30%2F2004&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=712fcc3b6642865731891d5d99eafb2c
2007-12-29 12:54:33 · answer #1 · answered by gardengallivant 7 · 0⤊ 0⤋
Yes, because the hair on their legs can stick to the wall.
2007-12-29 11:17:27 · answer #2 · answered by Anonymous · 0⤊ 0⤋
They sure can. I see em hanging out all the time...no pun intended.
2007-12-29 11:17:03 · answer #3 · answered by ? 2 · 0⤊ 0⤋
yes. there are some on my ceiling.
2007-12-29 10:05:05 · answer #4 · answered by Anonymous · 2⤊ 0⤋