closed, blood stays within vessels, 3 chambered heart
Pathway of blood
blood from lungs to into left atrium blood from body will go into right atrium enters into conus ateriosus then into the truncus arteriosus
Tell path of corrodic arch
carries blood to head
Tell path of aaortic arch
will wrap around backside of heart and join under the liver and forms the dorsal aaortic
What is the dorsal aaorta?
carries blood to the trunk of the body, arms, legs, and all digetstive organs
What is the pulmocataneous arch?
carries blood the the lungs, skin, and linings of the mouth
List and describe the veins
1. hypatic portal vein (carries blood through body) 2. venae cavae (same as 1) 3. sinus venosus (same as 1) 4. right atrium (same as 1) 5. renal portal wein (blood through kidneys) 6. pulmonary vein (blood back from lungs to heart)
Describe frog hibernation
occurs in the winter, frog or toad will go to bottom of pond, bury itself under leaves, goes dormant, respirates across skin, lives off stored fat
What is estivation?
similar to hibernation, but it occurs during summer, gets in shady area and goes dormant
What is the gullet?
horizontal opening or slit, leads to esophogaus
Why is the gullet so wide?
because frogs swallow food whole
What are internal nostril openings?
in the roof of the mouth, oxygen comes in and gas exchange occurs in the mouth as long as it is moist
What is the glottis?
vertical slit that leads to the lungs
Describe the digestive process
-swallows through gullet -food goes through esophagus -then to stomach, and gastric glands -then through pylloric valve and small intestines
What is the mesentery?
a small clear tissue called the mesentery
What is the colon?
the large intestine
Describe liver function
produces bile, breaks apart fat and stores it in the gall bladder