Columbia subject headings:
Afrosoricida--Physiology.
Erinaceomorpha--Physiology.
Eulipotyphla--Physiology.
Mammals--Physiology.
Marsupials--Physiology.
Monotremes--Physiology.
Physiology, Comparative.
Harvard subject headings:
Insectivores (Mammals)--Physiology.
Mammals--Physiology
Marsupials--Physiology.
Monotremes--Physiology.
Physiology, Comparative.
Princeton subject headings:
Insectivores (Mammals)--Physiology.
Mammals--Physiology.
Marsupials--Physiology.
Monotremes--Physiology.
Physiology, Comparative.