● `color{maroon}"Habitat"`: As the name indicates (`color{Violet}"Gr., Amphi : dual, bios, life"`), amphibians can live in aquatic as well as terrestrial habitats.

● `color{maroon}"Morphology"`:

● `color{maroon}"Body Structure"`:
`star` Most of them have `color{Violet}"two pairs"` of limbs.

`star` Body is divisible into `color{Violet}"head and trunk"`.

`star` Tail maybe present in some.

`color{maroon}"Sense Organs"`:
`star` The amphibian skin is `color{Violet}"moist"` (without scales).



`star` The eyes have `color{Violet}"eyelids"`.

`star` A `color{Violet}"tympanum"` represents the ear.



● `color{Brown}"Examples"`: Bufo (Toad), Rana (Frog), Hyla (Tree frog), Salamandra (Salamander), Ichthyophis (Limbless amphibia).

`star` `color{Brown}"Orifice"`: Alimentary canal, urinary and reproductive tracts open into a common chamber called `color{Violet}"cloaca"` which opens to the exterior.

`star` `color{Brown}"Respiration"`: Respiration is by `color{Violet}"gills"`, l`color{Violet}"ungs"` and through `color{Violet}"skin"`.

`star` `color{Brown}"Circulatory system"`: The heart is `color{Violet}"three chambered"` (two auricles and one ventricle).

`star` Sexes are `color{Violet}"separate"`.

`star` Fertilisation is `color{Violet}"external"`.

`star` They are `color{Violet}"oviparous"` and development is `color{Violet}"direct or indirect"`.

● `color{Brown}"Members"`: The class name refers to the members with their `color{Violet}"creeping or crawling"` mode of locomotion
(Latin, repere or reptum, to creep or crawl).

● `color{Brown}"Habitat"`: They are mostly terrestrial animals

● Reptiles are `color{Violet}"poikilotherms"`.

● Snakes and lizards `color{Violet}"shed"` their scales as `color{Violet}"skin cast"`.



● `color{Brown}"Examples"`: Chelone (Turtle), Testudo (Tortoise), Chameleon (Tree lizard), Calotes (Garden lizard), Crocodilus (Crocodile), Alligator (Alligator). Hemidactylus (Wall lizard), Poisonous snakes – Naja (Cobra), Bangarus (Krait), Vipera (Viper).

● `color{Brown}"Morphology"`:

`star` Their body is covered by `color{Violet}"dry and cornified"` skin, epidermal `color{Violet}"scales or scutes"` .



`star` Limbs, when present, are two pairs.

`star` They `color{Violet}"do not"` have `color{Violet}"external ear openings"`.

`star` `color{Violet}"Tympanum"` represents ear.

● `color{Brown}"Anatomy"`:

`star` Heart is usually `color{Violet}"three-chambered"`, but `color{Violet}"four-chambered"` in crocodiles.

● Sexes are `color{Violet}"separate"`.

● Fertilisation is `color{Violet}"internal"`.

● They are `color{Violet}"oviparous"` and development is `color{Violet}"direct"`.