Samhain Winter Moon
from Wired. Com
Ralph Grimm, Jimboomba Queensland, Australia.
Subject: Paramecium, showing contractile vacuole and ciliary motion. Paramecium lives in fresh water. The excess water it takes in via osmosis is collected into two contractile vacuoles, one at each end, which swell and expel water through an opening in the cell membrane. The sweeping motion of the hair-like cilia helps the single-celled organism move.
Technique: Differential interference contrast
Magnification: 350x-1000x
Credit: Ralph Grimm / Olympus BioScapes Digital Imaging Competition®
