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In frogs and toads, the tympanum is a large external oval shape membrane made up of nonglandular skin. [2] It is located just behind the eye. It does not process sound waves; it simply transmits them to the inner parts of the amphibian's ear, which is protected from the entry of water and other foreign objects.
The glass frog's transparent skin allows an external view of the viscera—the internal organs present in the body's main cavity—making it so observers can witness the frog's internal processes, such as the heart beating and pumping blood through its arteries.
The eggs hatch into aquatic larvae called tadpoles that have tails and internal ... (external gills at first, internal ... virtual dissection. [222] Frogs have served ...
The vocal sac is the flexible membrane of skin possessed by most male frogs and toads. The purpose of the vocal sac is usually as an amplification of their mating or advertisement call. The presence or development of the vocal sac is one way of externally determining the sex of a frog or toad in many species; taking frogs as an example;
Hyalinobatrachium yaku is a species of frog in the family Centrolenidae.It is found in the Pastaza, Orellana and Napo Provinces of Ecuador.One of the remarkable characteristics of this species is that their belly and some internal organs are transparent leaving the red heart completely exposed through transparent parietal peritoneum and pericardium. [1]
Anatomy of a wood frog tadpole (Lithobates sylvaticus) As a frog tadpole matures it gradually develops its limbs, with the back legs growing first and the front legs second. The tail is absorbed into the body using apoptosis. Lungs develop around the time as the legs start growing, and tadpoles at this stage will often swim to the surface and ...
Thus, the tailed frogs exhibit internal fertilisation, rather than the external fertilisation found in other frogs. [8] Ascaphidae and Leiopelmatidae are primitive to almost all other frogs in having nine amphicoelous vertebrae and a caudalipuboischiotibialis tail-wagging muscle in adults.
Adult frogs live in fresh water and on dry land; some species are adapted for living underground or in trees. Frogs typically lay their eggs in the water. The eggs hatch into aquatic larvae called tadpoles that have tails and internal gills. They have highly specialised rasping mouth parts suitable for herbivorous, omnivorous or planktivorous ...