Marine Reptiles and Birds. Class Reptilia Characteristics Strong bony skeleton Well developed lungs...
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Transcript of Marine Reptiles and Birds. Class Reptilia Characteristics Strong bony skeleton Well developed lungs...
CharacteristicsStrong bony skeletonWell developed lungsMost have 2 pairs of legsLegs are thickToes with clawsExcretory system designed to
conserve water
Characteristics Cont’dColor changeDominant sense – sightUric acid – primary excretory
product4 chambered heartSex determination
- high temp – males- low temp - females
Order TestudinesTurtles@ 225 speciesBeak rather than teethEat plants and animalsMost are highly endangeredLeatherback up to 9’ and 1 ton.
Order SquamataSuborder Sauria
LizardsEat plants and animalsKomodo Dragon – up to 10 ft longMarine Iguanas – feed on algae
Order SquamataSuborder SerpentesSnakesNo limbsStrong flexible bodiesOviparous or ovoviviparousWell developed sense of taste
and smell
Snake FeedingJacobson’s organs – olfactory
pouches used to track prey and find females
Pit organs – detect heatSwallow prey wholeUpper and lower jaws can
move independentlyPosteriorly pointing teeth
Snake VenomHemotoxins
- destroy red blood cells and cause internal bleeding
- vipersNeurotoxins
– paralyze nerve cells, respiratory paralysis
- Cobras, coral snakes, and sea snakes
Order CrocodiliaCrocodiles and AlligatorsDifferencesCarnivoresLive in waterExtend nostrils above water for
air
Feathers
Composed mainly of keratin Down feathers - soft, fluffy feathers providing
insulation. Filoplumes - thin, hair-like feathers. Contour feathers - shape and color the body. Flight feathers - specialized contour feathers on
wings and tail that provide lift.
Skeleton
Light bones Air sacs – greatly increase lung’s ability to
take in oxygen. Forelimbs function as wings, not for grasping Types of feet based on type of food and
environment.
Cardiovascular System
Body temperature is internally regulated (endothermic)
Heart is 4-chambered High metabolism - provides the large
amount of energy needed for flight. Rapid heartbeat - moves large amount of
blood through the body for gas exchange.