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Frog Morphology Short Notes

In this article we will discuss about the Frog Morphology

Frog Morphology

Rana tigrina is the most common species of frog
They are poikilotherms or cold blooded
Frog is almost cosmopolitan nearby watery areas
Frogs use camouflage to avoid predators
The summer sleep of the frog is known as aestivation
The winter sleep of the frog is known as hibernation
The sound made by the male frog during breeding season is called croaking. It is a call for mating
Size varies from 18 to 20cm in length and 5 to 8cm in width
Body of frog is adapted for burrowing, jumping and swimming
The frog never drinks water but absorb it through the skin
The body of the frog is divided into head and trunk
Both neck and tail are absent

Head

Head is triangular & its anterior conical part is called snout
Two openings are present tip of snout is called nostrils
Pair of nostrils helps in respiration
On top of head pair of eyes are present. In eyes upper eyelid is immovable, lower eyelid is freely moveable and nictitating membrane arises from lower eyelid
Frog lacks external ear. The ear drum or tympanum is present behind and below each eye
In male vocal sacs are present, croaking during breeding season

Trunk

Head is broadly joined behind with the flat trunk
Two pairs of limbs are attached to its trunk

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Fore limb

The fore limb is shorter than the hind limb
Fore limbs that end in four digits
In male frog ventral side of first digit copulatory pad enlarge during breeding season
This pad help the male frog to grip the female during copulation

Hind limb

They are larger and muscular
The hind limbs end in five digits
They have webbed digits that help in swimming

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