Introduction 🔹 The king­dom Ani­malia con­sists of mul­ti­cel­lu­lar organ­isms that are clas­si­fied based on their lev­els of orga­ni­za­tion, body sym­me­try, and coelom (body cav­i­ty).🔹 This […] [...]

NOTOCHORD: CHORDATES:Ani­mals that pos­sess a noto­chord. NON-CHORDATES:Ani­mals that do not form a noto­chord. Exam­ples: Porifera to Echin­o­derms. [...]

SEGMENTATION: In some ani­mals, the body is exter­nal­ly and inter­nal­ly divid­ed into seg­ments with a ser­i­al rep­e­ti­tion of at least […] [...]

Body Cav­i­ty: The pres­ence or absence of a cav­i­ty between the body wall and the gut wall is a key […] [...]

Ani­mal Sym­me­try: Ani­mals can be cat­e­go­rized based on their body sym­me­try. ASYMMETRY: Sponges are most­ly asymmetrical.No plane pass­ing through the […] [...]

DIGESTIVE SYSTEMS: Incom­plete Diges­tive Sys­tem: Sin­gle open­ing to the outside.This open­ing serves as both mouth and anus. Exam­ple: Platy­helminthes (flat­worms). […] [...]

Lev­els of Orga­ni­za­tion in Ani­malia MULTICELLULARITY: All mem­bers of Ani­malia are mul­ti­cel­lu­lar. How­ev­er, the orga­ni­za­tion of these cells varies sig­nif­i­cant­ly. […] [...]

Need for Clas­si­fi­ca­tion: There are over a mil­lion species of ani­mals described, mak­ing clas­si­fi­ca­tion cru­cial. Clas­si­fi­ca­tion helps in orga­niz­ing ani­mals […] [...]