What are we doing today? Have out a piece of paper labeled ‘Turtles’ Discuss dissection Take notes

General Info… If you have not turned in your Lab Safety Contract by Tuesday afternoon before you go home, you WILL NOT go into the lab…you WILL go to ISS and write a 5 page essay on turtles! (LSCs are on my website!) You will be dissecting on Wednesday with Mrs. Tadlock (Rogers)!

Turtle Cutters… After taking notes, I am going to write down the names of the students who want to cut on the turtles and those who absolutely DO NOT want to cut on the turtles. You will be grouped according to your answers.

Turtle Organs Heart In the center Covered with a light color film 3 chambers: 2 atrium (left and right), 1 ventricle Lung Back of turtle next to shell Thin Very dark tiny veins (capillaries)

Turtle Organs Liver 2 livers called left and right lobes Liver produces bile (chemical that helps body absorb nutrients) Gall bladder under the “right” liver lobe (pay attention to perspective of right and left) Funky green in color Stores bile in concentrated amounts

Turtle Organs Stomach Under left liver lobe C-shaped Fits into the liver like a puzzle piece Small intestine Swirly-tube shape Bottom of cavity

Turtle Organs Trachea Bumpy upside down tree Feels like a bendy straw Esophagus Behind trachea Covered with muscles

Turtle Dissection

You will need to be able to do the following: Identify the parts of turtle Answer general questions about turtles Bring your own medical gloves!

TURTLE LATIN meaning KINGDOM _____________ PHYLUM ____________________________ SUBPHYLUM ___________________________ CLASS _______________________________ ORDER _____________________________ ANIMALIA CHORDATA VERTEBRATA “backbone” REPTILIA “to creep or crawl” CHELONIA “tortoise”

INTEGUMENT THICK, DRY, SCALY SKIN Contains KERATIN (protein) LIPIDS & PROTEINS make it water tight

Reptiles VS Amphibians Amphibian - group of animals that live two lives: one in water with gills and the other on land by growing lungs as they age. They have smooth, thin skin and are ectothermic. They have short fore limbs and long back limbs and lay eggs that are surrounded by a soft gel material. Ex: frogs, toads newts and salamanders Reptiles are a group of animals that have scales (or modified scales), breathe air, ectothermic, and usually lay eggs with hard/leathery coating or eggs remain in body till they hatch. Most reptiles live on land. Crocodiles, snakes, lizards, and turtles are all examples of reptiles.lizards

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SHELL IS LIVING PART OF BODY Expanded ribs form shell Can regenerate damaged scutes Growth rings tell age

Limbs at right angles to body

Location of Pelvic and Pectoral girdles allow turtle to pull limbs into shell

Turtles are the only reptiles with NO TEETH

Claws on feet

WHAT SEX IS IT? FEMALES: MALES: Short tail Longer tail Vent closer Vent farther from body

MALE PLASTRON slightly CONCAVE to fit on top of female CURVE OF PLASTRON FEMALE PLASTRON slightly CONVEX to make more room for eggs

ECTOTHERMIC ADVANTAGES: Slow metabolism means you can survive on 1/10 the food as a same size endotherm DISADVANTAGES: Can’t to live in extremely cold places (NO reptiles in Arctic) Can’t keep up max activity level for long

That just about does it! Now…who would not mind cutting on the turtle? Who absolutely DO NOT want to cut on a turtle?