Reptilia creepy crawly
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Reptilia – “creepy crawly” PowerPoint PPT Presentation


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Reptilia – “creepy crawly” . Examples: snakes, lizards, crocodiles, turtles. Traits. Dry, scaly skin. Traits. ectotherms. Traits. Well developed lungs. Traits. 3 chambered heart with partially divided ventricle. Traits. Muscular bony legs to the sides, if any at all. Traits.

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Reptilia – “creepy crawly”

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Reptilia creepy crawly

Reptilia – “creepy crawly”

  • Examples: snakes, lizards, crocodiles, turtles


Traits

Traits

  • Dry, scaly skin


Traits1

Traits

  • ectotherms


Traits2

Traits

  • Well developed lungs


Traits3

Traits

  • 3 chambered heart with partially divided ventricle


Traits4

Traits

  • Muscular bony legs to the sides, if any at all


Traits5

Traits

  • Toes with claws


Traits6

Traits

  • Internal fertilization


Traits7

Traits

  • Lay amniotic eggs on land

Amphibian egg

Reptile egg


Reptilian heart

Reptilian heart

  • Good pressure, partially divided ventricle keeps blood from mixing as much


Reptilian adaptations for land life

Reptilian adaptations for land life

  • To avoid dehydration – waterproof skin, colon absorbs water from feces, low respiration rate loses less water

  • Reproduction – internal fertilization, amniotic egg


Copulation

Copulation

  • Process of internal fertilization, male inserts sperm into the female system


Amniotic egg

Amniotic egg

  • Overcame the last obstacle to life on land


Amnion

Amnion

  • provides a water environment for the developing embryo

embryo

amnion


Albumen

Albumen

  • Provides protein for building materials (white)

albumen

embryo


Yolk sac

Yolk sac

  • Provides food energy

yolk sac

embryo


Shell and chorion

Shell and Chorion

  • Protects and waterproofs

shell

chorion

embryo


Allantois

Allantois

  • Collects wastes, acts as a respiratory surface

allantoise

embryo


Orders of reptiles

Orders of Reptiles

Squamata

Testudinata

Crocodilia

Rhynchocephalia


Squamata

Squamata

  • Largest order of reptiles

  • E.g. – snakes and lizards


Testudinata

Testudinata

  • Turtles and tortoises

How do you tell them apart?


Turtles

Turtles

  • live mostly in water, flatter shell, fast


Tortoises

Tortoises

  • live on land, rounded shell, slow


Turtle or tortoise

Turtle or Tortoise?


Turtle or tortoise1

Turtle or Tortoise?


Crocodilia

Crocodilia

  • Crocodilesand alligators


Reptilia creepy crawly

  • Crocodiles

  • narrow head

  • pointed snout

  • teeth visible on top

  • and bottom

Alligators

  • broad head

  • rounded snout

  • teeth not as visible on bottom


Alligator or crocodile

Alligator or Crocodile?


Alligator or crocodile1

Alligator or Crocodile?


Alligator or crocodile2

Alligator or Crocodile?


Alligator or crocodile3

Alligator or Crocodile?


Rhynchocephalia

Rhynchocephalia

  • Tuatara

3 rows of teeth (2 on top and 1 on bottom) and a light sensitive gland on its forehead that looks like a third eye


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