How many orders does kingdom animalia have?

Thousands, but why do you want to know the specific number? Just know that after Kingdom is phylum, then Class, Order, family, genus and finally species. Class mammalia alone has 8. There are already many phyla, superphyla and subphyla in this kingdom. read more

Just know that after Kingdom is phylum, then Class, Order, family, genus and finally species. Class mammalia alone has 8. There are already many phyla, superphyla and subphyla in this kingdom. read more

Some of the animals have a 2 chambered heart, and some have a four chambered heart. One example of a double chambered heart is a bird, and then the one that has four chambers is a human. Respiratory-Absorption of oxygen; removal of CO2-Lungs, gills. read more