What is the main difference between a human heart and a leopard frogs heart?

Is less fetal movement in 9th month harmfull for the baby? What causes high and low temperature? Is it ok to find 3 red blood cells in urine? How do you know if you have a crack skull? Contains centers for hunger and sex drives? Where are sex-linked conditions most often carried? What does sword going through skull mean? What does acid reflux diet means? How long do you have to stop drinking alcohol to get pregnant? How many sesamoid bones in a bovine skeleton? What part of the digestive system reproduces insulin to control blood sugar? Can using saliva for lube while having intercourse harm your baby while your pregnant? What five age related changes occur in the digestive system? Total abdominal hysterectomy? Someone who over exaggerates? What kind of people would be most at risk for potassium deficiency? Gyn pap smear results are abnormal cells or ASCUS need colposcopy THAT means I have cervical cancer? A fever with no other symptoms? These control kidney function and increase blood pressure and heart rate during times of stress? Why do guavas smell bad to others and good to me?