Knowsley Safari Park, Reptiles amphibians invertebrate, 2.8.16


Reptiles are cold blooded. This means they can’t control their body temperature. They can maintain function over a large temperature range of 24 to 35 degrees.

Reproduction and excretion occurs through the cloaca.


There are approximately 300 species of snakes. The longest is the reticulate Python (9m), the shortest is the Barbados thread snake (10cm).

The Jacobson’s organ is used for tracking their prey. It examines the air Bourne particles that the tongue has collected.

Their heart can move around due to the lack of a diaphragm this is helpful when passing large prey. Their left lung is smaller or non existent. Their paired organs are staggered.

Sloughing is shedding skin, replacing worn skin. This keeps it healthy and free from parasites.


There are 600 species of lizards, ranging from 3cm-3m. They are able to break from the grip of predators due to autonomy which is breaking their tail off.


Crocodiles have adaptations that make them good hunters…

•Streamlined body

•Jaw muscles to keep hold of prey

•Webbed feet

•Ears, eyes, and nostrils on top of head

•High stomach PH to digest bones and hooves


The top part of the shell is called the carapace and the bottom part is called the plastron.


Undergo metamorphism (changing from gills to lungs). They use their skin as a a secondary respiration system.

Features include

•3 pairs of legs

•3 body parts

•chitinous exoskeleton

•pair of antenna

•compound eye



•Mantle-> organ sack

•Radula-> chitinous tongue

Many have no central brain but clumps of nerves at key points


Breathe through spiracles

Their lower lip containers a maxillae which are structures used for tasting and manipulating food.



•8 legs

•Additional appendages

They have 2 body segments called prosoma and abdomen and two kinds of eyes.



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