The hand or manus bears 4 digits (fingers) without webbing. Here, the short limbs arise from the anterior part of the trunk, from just behind the head.The trunk of the frog laterally has two pairs of limbs.This aperture is the vent that facilitates the discharge of fecal, and urinary wastes as well as the reproductive material like the sperms and ova.At the posterior end of the frog’s trunk, there is a small aperture called the cloacal aperture.The trunk is the region that encases the lungs, heart, digestive tract, liver, genitals, and kidneys.This hump is especially conspicuous when the frog starts to squat.Its back part is raised in the middle region in a characteristic sacral prominence of the hump.
In frogs, the head is broadly joined with a flat ovoid trunk with the body.This is responsible for collecting the sound waves.
#Frog parts of body skin#
Each eye has a thick and pigmented immovable lower eyelid.When the eyes are pressed downwards, they make an imminent presence on the buccal cavity.In the head region, the two protruding eyes are situated dorsolaterally on the top.Two small openings are found on the head region which lies dorsally above the mouth tip of the snout and also serves in respiration.The region is a flat, and rough triangle in outline and with a blunt anterior snout that terminates in a wide transverse mouth.The head of the frog is somewhat demarcated clearly from the trunk region.Change in color of the skin is also seen in frogs due to the expansion of melanophores pigment.A light yellow mid-dorsal line is seen on the body of the frog which runs from the tip to the snout to the cloacal opening at the back of the body.In some cases, brown spots are also found in the central part.It is seen generally, that the color of the frog’s skin is mainly green with black and yellow spots over it.The back part of the frog skin has dorsolateral folds and thickenings, called dermal plicae.The skin is ill-fitted to the body of the frog, which remains like loose skin layers.In general, the skin of the frog is thin, slimy, and moist for the application of cutaneous respiration.The frog has a tail at birth but it disappears as the frog grows by metamorphosis.The size of a general frog is approximately 12 to 18 cm in length and 5 to 8 cm in width.Commonly, the body is divisible into the head, trunk, and limbs with no neck and tail.In some cases, the body is slightly flattened dorsoventrally and streamlined to swim through the water areas.The body of the frog is somewhat spindle-shaped, rounded posteriorly, and pointed anteriorly.Frog external anatomy with head, trunk and limbs Shape and Size
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