No. Frogs are not mammals nor endothermic, which is why they change their heart rate and temperature to match their surroundings. Humans regulate their body temperature and heart rate at a steady rate no matter what their surroundings are.
Cardiac muscle is similar to smooth muscle in that both are involuntary. Cardiac muscle is similar to skeletal muscle because they are both striated.
They thought the evolution of new species is linked to environmental changes
they thought the evolution of a new species is linked to environmental changes
They thought the evolution of new species is linked to environmental changes
they thought the evolution of new species is linked to environmental changes
they thought the evolution of new species is linked to environmental changes
they thought the evolution of new species is linked to environmental changes
they thought the evolution of new species is linked to environmental changes
They thought the evolution of new species is linked to environmental changes
They thought the evolution of new species is linked to environmental changes
they thought the evolution of a new species is linked to environmental changes
they thought the evolution of a new species is linked to environmental changes