Search results
Results From The WOW.Com Content Network
The leg is skinned, and two electrical connections are made. These may be made to the nerve and the foot of the frog's leg by wrapping them with metal wire or foil, [16] but a more convenient instrument is Matteucci's arrangement shown in the image. The leg is placed in a glass tube with just the nerve protruding.
It was usual to use the thighs of frogs for the battery construction. The legs of the frog were first skinned, then the lower leg was cut off at the knee joint and discarded. Damaging the muscle during this procedure would detract from the results. The thigh muscle was then cut in two transversely to produce two half-thighs.
The African clawed frog or platanna, Xenopus laevis, was first widely used in laboratories in pregnancy assays in the first half of the 20th century.When human chorionic gonadotropin, a hormone found in substantial quantities in the urine of pregnant women, is injected into a female X. laevis, it induces them to lay eggs.
Most of these frogs are caught in the wild, but some are raised in captivity. The United States is a net importer of frog legs. [68] The American bullfrog is used as a specimen for dissection in many biology and anatomy classes in schools across the world. [69] It is the state amphibian of Missouri, Ohio, and Oklahoma. [70]
A key principle in the dissection of human cadavers (sometimes called androtomy) is the prevention of human disease to the dissector.Prevention of transmission includes the wearing of protective gear, ensuring the environment is clean, dissection technique [2] and pre-dissection tests to specimens for the presence of HIV and hepatitis viruses. [3]
The popularity of the famous French delicacy of cuisses de grenouille, or frogs’ legs, is threatening the existence of certain frog species, a group of more than 500 environmental campaigners ...
Dissection of a frog. Pain is an aversive sensation and feeling associated with actual, or potential, tissue damage. [1] It is widely accepted by a broad spectrum of scientists and philosophers that non-human animals can perceive pain, including pain in amphibians.
NOAA's Okeanos Explorer team recently spotted a strange fish with legs during its deep sea mission. Known generally as a frog fish and specifically as a Chaunax, the underwater creature has ...