iii reptiles dinosaurs n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
iii) Reptiles -Dinosaurs PowerPoint Presentation
Download Presentation
iii) Reptiles -Dinosaurs

Loading in 2 Seconds...

play fullscreen
1 / 14

iii) Reptiles -Dinosaurs - PowerPoint PPT Presentation


  • 84 Views
  • Uploaded on

iii) Reptiles -Dinosaurs. By: Camila Rodriguez. Dinosaurs. Not the first reptile Triassic period Cretaceous period Diapsid skull. Reason for the name. # of species currently existing. From the Latin word ' reptilis ' Means ' creeping’. 9,475 species

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'iii) Reptiles -Dinosaurs' - walker


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
iii reptiles dinosaurs

iii) Reptiles-Dinosaurs

By: Camila Rodriguez

dinosaurs
Dinosaurs
  • Not the first reptile
  • Triassic period
  • Cretaceous period
  • Diapsid skull
reason for the name
Reason for the name

# of species currently existing

  • From the Latin word 'reptilis'
  • Means 'creeping’
  • 9,475 species
  • Divided in 4 groups: Crocodilia, Squamata, Testudines and Sphenodontia.
  • Crocodilia: alligators, crocodiles, caimans and gharials.
  • Squamata: Snakes and Lizards
  • Testudines: tortoises and turtles
  • Sphenodontia: tuataras
crocodilia

Squamata

Crocodilia

Testudines

Sphenodontia

reptile characteristics
Reptile characteristics
  • Vertebrates=have backbone/internal skeleton
  • Cold blooded
  • Lay eggs on land (amnioteeggs)
  • Get oxygen from lungs
  • Dry scaly skin
  • Hatch into young adults
  • 3 chambered heart (alligators and crocodiles)
  • 2 aortic blood vessels
  • 4 or no legs
  • Internal fertilization
fossil record
“Fossil record”
  • Oldest fossil 315 million years - Hylonomus (late Carboniferous period)
life cycle
Life Cycle
  • Some lay their eggs and some give live birth. (oviparous)
  • Some reptiles stay with their parents when born
  • Grows becoming an adult
  • Female fertilize internally producing the eggs
  • They can reproduce more than once
  • After giving birth they die
  • Asexual reproduction
life expactancy
LifeExpactancy
  • Giant Tortoise: 152 years
  • Box Turtle 123 years
  • Alligator 68 years
  • Snapping Turtle 57 years
  • Cobra 28 years
  • Cottonmouth 21 years
digestive system
Digestive System
  • Very simple
  • Mouth
  • Salivary gland- softens and moistens food
  • Esophagus- a tube in which the food goes from the pharynx to the stomach
  • Intestine- from stomach to anus
  • Cloaca- outlet intothe intestinal, urinary, and genital open
  • Eat
  • Most reptiles are carnivores feed on small invertebrates (mammals, reptile)
  • Some are herbivores feed on plant such as grasses, fruits, shrubs and marine plants.
respiratory system
Respiratory System
  • Breath using lungs
  • Gas exchange in reptiles occurs in the alveoli ( diaphragm)
  • Breathing occurs in a change in the volume of the body cavity.
    • Controlled by contraction of intercostalmuscles.
  • Turtles and tortoise
    • Ventilation of the lungs
    • sheets of muscle in the shell that, through contraction and relaxation, force air in and out of the lungs
circulatory system
Circulatory System
  • Closed system
  • 3 chambered hearts with two atria
  • Blood flows through heart
  • Mixing of oxygenated and deoxygenated blood
sensory system
Sensory System
  • They feel pain, temperature, pressure, and stretching at the dermal level.
  • Crocodilia
    • Vertical cat-like pupil excellent diurnal / nocturnal vision
    • External ears
    • Eardrums
    • Nostril
  • Squamata
    • Eyelids- spectacle
    • Smell with their tongue
    • Ears
  • Testudines
    • smell
    • Ears: only hear vibrations and changes in water pressure
    • Night vision
sensory system1
Sensory System
  • Sphenodontia
  • Great vision
  • Third eye
  • Weak taste buds
bibliography
Bibliography
  • http://staff.tuhsd.k12.az.us/gfoster/standard/breptil.htm
  • http://animals.about.com/od/zoologybasics/a/howmanyspecies.htm
  • http://cowgirljess.hubpages.com/hub/The-Four-Groups-of-Reptiles
  • http://honorsbiologyp6.wikispaces.com/Reptiles+-+Sensory+Systems
  • http://www.exoticpetvet.net/reptile/rerepro.html
  • http://www.britannica.com/EBchecked/topic/498684/reptile/38474/Digestive-and-urogenital-systems
  • http://www.sandiegozoo.org/animalbytes/t-lizard.html