A taxonomic category between kingdom and class is —

Phylum

Explanation: Phylum is a taxonomic ranking that comes third in the hierarchy of classification, after domain and kingdom. Organisms in a phylum share a set a characteristics that distinguishes them from organisms in another phylum.   The phylum group is then divided into even smaller groups, known as classes. For example, phylum Chordata , which is split up into classes, Mammalia, Fishes, Aves, Amphibia and Reptilia.

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger

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