United States or Slovakia ? Vote for the TOP Country of the Week !
The cercariae soon wriggle their way out of the body of the snail, and then complications arise: for it is the habit of this particular snail to leave the water occasionally and take a stroll in the fields. Thus the cercariae, escaping from the snail, find themselves on the grass, whereupon they promptly drop their tails and stick themselves to the grass-blades.
The cercariae soon wriggle their way out of the body of the snail, and then complications arise: for it is the habit of this particular snail to leave the water occasionally and take a stroll in the fields. Thus the cercariae, escaping from the snail find themselves on the grass whereupon they promptly drop their tails and stick themselves to the grass-blades.
Then comes the unsuspecting sheep to take his frugal meal, and, cropping the grass swallows it, cercariae and all. But the latter, when they find themselves in the sheep's stomach, make their way straight to the bile-ducts, up which they travel to the liver. Here, in a few weeks, they grow up into full-blown flukes and begin the important business of producing eggs.
Then comes the unsuspecting sheep to take his frugal meal, and, cropping the grass, swallows it, cercariae and all. But the latter, when they find themselves in the sheep's stomach, make their way straight to the bile-ducts, up which they travel to the liver. Here, in a few weeks, they grow up into full-blown flukes and begin the important business of producing eggs.
So they go on for several generations, but at last there comes a generation of rediae which, instead of giving birth to fresh rediae, produce families of totally different offspring; big-headed, long-tailed creatures like miniature tadpoles, called by the learned cercariae.
So they may go on for several generations, but at last there comes a generation of rediae which, instead of giving birth to fresh rediae, produce families of totally different offspring; big-headed, long-tailed creatures like miniature tadpoles, called by the learned cercariae.
Word Of The Day