It is the tongue.
Their lungs and diaphragm
The external part of the frog, such as its skin, is responsible for respiration, protection against pathogens, and regulation of body temperature. Additionally, the skin of a frog helps in absorbing water and nutrients.
The outer part of a frog is comprised of the skin, which protect the frog and helps keep it moist.
The anus.
frog legs
When a frog floats, typically, its head and part of its back remain above the surface of the water. The frog's limbs may be partially submerged, but its buoyant body allows it to keep its head elevated for breathing. This positioning helps the frog stay aware of its surroundings while conserving energy.
Thorax
Circulatory system
The digestive system.
The dorsal aorta of a frog is the main blood vessel that carries oxygenated blood from the heart to the rest of the body. It runs along the dorsal side of the frog's body, supplying blood to the organs and tissues. It is part of the circulatory system that helps distribute nutrients and oxygen throughout the frog's body.
the thorax
Its exoskeleton.