REPTILES

Výukový materiál OR 03 - 75Tvůrce: Mgr. Alena Výborná

Tvůrce anglické verze: Mgr. Miloslava DorážkováProjekt: S anglickým jazykem do dalších předmětů

Registrační číslo: CZ.1.07/1.1.36/03.0005Tento projekt je spolufinancován ESF a SR ČR

REPTILES

•have changeable blood heat (cold-blooded)

•reproduction does not depend on water environment

•adapted to land life•breath by lungs•the surface of a body is protected against

drying by:shell bone

platescorneous

scales

REPTILES•secretion:•concentrate urine (they keep water in the

body)•most of them lay eggs lay eggs • ovoviviparieovoviviparie (young ones are come out from

eggs during laying) – a viviparous lizard, a slow-worm, a smooth snake

• viviparie viviparie – a viper•eggs on the land and some of them care of

them•growth of reptiles is slow, they grow whole

their lives

TORTOISES

•have shells from bone plates, vertebras and ribs grow out of them

• toothless jaws (hard keratin)• live in tropics and subtropics•200 kinds of tortoises•an european pond turtle is original in

our country•A red eared slider, a spur-thighed tortoise,

a galapagos tortoise, a green sea turtle

European pond turtle

Red eared slider

Spur-thighed tortoise or Greek tortoise

Crocodiles

•their body is covered by corneous carapaces, there are corneous plates under them

•they live in water (they swim with help of the tail)

•they lay eggs on the land•they eat fish, land vertebrates and

carrions, young ones eat insect and small fish

Crocodiles

•we divide crocodiles into:

1) crocodiles

2) alligators and caymans

3) gavials

Crocodile

Alligator

Gavial

Squamata

•SNAKES AND LIZARDS•the body is covered by scales•they get the skin off (snakes whole,

lizards in parts )•tongue - jagged •there exist about 6000 different kinds• lizards (eyelids are not grown together)• snakes (eyelids are grown together)

Squamata

•warning behaviour (signals of threat):• they open their mouths •they extend their bodies •they produce sound signals

Squamata

•LIZARDS•the most numerous group of reptiles•most of them live in tropics and subtropics •on ground, in trees, in water•most of them have fully developed legs •their tail breaks off in dangerous

(protection against predators)•there are 3 kinds of lizards and a slow-

worm in our country

Slow-worm

Sand lizard

Squamata

• SNAKES SNAKES •the youngest group of reptiles•they do not have limbs •both halves of both jaws are flexibly

connected by extensible ligaments swallowing of big bites

•transparent eyelids are grown together •venom glands

Squamata

•their sight is imperfect •they do not have an outer auditory organ

and an ear drum •they have Jacobson´s organ (a hole in

the top plate of the mouth)– it reacts to chemical stimulations (smells)

•they have organs reacting to temporal changes

Squamata

•our snakes:•A viper, ringsnakes (a grass snake, a

smooth snake, an aesculapian snake)•boas :•constrictors, anacondas (South America),

pythons (SE Asia, Australia and Africa)•poisonous:•cobra, rattle-snake, sea serpent

Viper

Ringsnake

Cobra

Revision:

•1. What is the difference between reptiles and amphibians?

•2. Are reptiles cold blooded? •3. Viviparous reptile is ……………•4. Which tortoise is original in the Czech

Republic?•5. Our reptiles (except lizards) include…..•6. What do reptiles excrete?

Source:• DOBRORUKA, Luděk J. Přírodopis pro 7. ročník základní

školy. 1. vyd. Praha: Scientia, 1998, 152 s. ISBN 80-718-3134-4

• Obrázky: http://commons.wikimedia.org (osvobozeno od autorských práv)