Australian Stock Saddle much deeper seat, higher cantle, and knee pads in the front to create a very secure saddle for riders who ride in rough conditions or spend long hours on a horse. The saddle is kept on with a girth attached to billets under the flaps, similar to those on a dressage saddle. A surcingle passing over the seat of the saddle is also used to provide additional safety. The rear of the saddle is sometimes secured by a crupper. A breastcollar is sometimes added. A saddle blanket or numnah is used under the saddle to absorb sweat and to protect
Animal testing on frogs which reaches its reproductive age in five months rather than one to two years (as in "X. laevis"), facilitating faster studies across generations. The genome sequence of "X. tropicalis" was scheduled to be completed by 2015 at the latest. Frogs are widely used in classroom dissections and teaching exercises. Animal testing on frogs Frogs have been used in animal tests throughout the history of biomedical science. Eighteenth-century biologist Luigi Galvani discovered the link between electricity and the nervous system through studying frogs. The African clawed frog or platanna, "Xenopus laevis", was first widely used in laboratories in pregnancy assays in