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Circulatory System of Turtles

bio lab presentation

Teonna Fleming

on 22 October 2012

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Transcript of Circulatory System of Turtles

Amphibians were the first vertebrates on land. In making the transition from water to land, major changes occurred including:
a movable head modified muscles for air movement
skin glands to prevent dessication eyes modified for air vision reptiles developed a shelled egg. A turtle is a vertebrate Reptiles evolved from amphibians Turtle's body temperature depends on it's surroundings, making it ectothermic. They are more commonly referred to as cold blooded. Metabolic rate is the pace at which energy is used by an organism. Being ectothermic the turtle's metabolism depends on the environment it is in as it's body temperature depends on its surroundings. Therefore, turtles tend to eat less and require less energy than would an endothermic organism. Ecto-thermic Anatomy of Heart A turtle's heart keeps beating even after you've cut it out of the body. http://www.omg-facts.com/view/Facts/48357?id=48357&c_val=1

Dependent on the species, a turtle can live up to about 100 years old. According to the Guinness Book of World Records,the oldest tortoise to ever live was 178 years old! http://www.worldrecordacademy.com/nature/img/112410-1_Jonathan-the-tortoise_oldest_living_animal.jpg

Turtles can breathe under water for 33 straight hours.
Turtles have been on the Earth for more than 200 million years.
A turtle's shell is composed of 60 different bones all connected together for strength and protection.

Interesting Facts How does the Turtle's heart work? All vetebrates share a set of distinct characteristics.
1. Notochord
2. Dorsal nerve cord
3. pharynx
4. ventral heart
5. post anal tail
Turtles are grouped within the vertebrate class as reptiles. all reptiles have scales and reproduce without returning to water Their heart has 3 chambers
-completely divided atria; incompletely divided 3-region ventricles. This structural relationship allows for complete separation of oxygenated and deoxygenated blood. They have a high pressure systemic circulation and low pressure pulmonary circulation, this allows shunting of blood between both circuits that occurs when the lungs are not used for respiration during diving or hibernation. Circulation of Blood
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