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Chordate

Chordate

Chordates are animals which are either vertebrates or one of several closely related invertebrates. They are united by having, for at least some period of their life cycle, a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail. The phylum Chordata consists of three subphyla: Urochordata, represented by tunicates; Cephalochordata, represented by lancelets; and Craniata, which includes Vertebrata.

 
 
Arthropod

Arthropod

An arthropod is an invertebrate that has an exoskeleton, a segmented body, and jointed attachments called appendages. Arthropods are animals belonging to the Phylum Arthropoda (from Greek arthron, "joint", and podos "foot", which together mean "jointed feet"), and include the insects, arachnids, crustaceans, and others. Arthropods are characterized by their jointed limbs and cuticles, which are mainly made of α-chitin; the cuticles of crustaceans are also biomineralized with calcium carbonate.

 
 
Insect

Insect

The first section of the alimentary canal is the fore-gut (27) or stomodaeum. In the fore-gut, initial breakdown of large food particles occurs, mostly by saliva. The fore-gut includes the Buccal cavity, the esophagus, and the crop, which stores food before it passes to the mid-gut. Once food leaves the crop, it passes to the mid-gut (13) or mesenteron. The mid-gut is where digestion really happens, through enzymatic action.

 
 
Bird

Bird

Birds are winged, bipedal, endothermic, vertebrate animals that lay eggs. There are around 10,000 living species, making them the most numerous tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Birds range in size from the 5 cm (2 in) Bee Hummingbird to the 3 m (10 ft) Ostrich.

 
 
Lepidoptera

Lepidoptera

Lepidoptera is an order of insects that includes moths and butterflies. It is one of the most speciose orders in the class Insecta, encompassing moths and the three superfamilies of butterflies, skipper butterflies, and moth-butterflies. Members of the order are referred to as lepidopterans. A person who collects or studies this order is referred to as a lepidopterist. This order has more than 180,000 species in 128 families and 47 superfamilies.

 
 
Mollusca

Mollusca

Molluscs are animals belonging to the phylum Mollusca. There are around 93,000 recognized extant species, making it the largest marine phylum with about 23% of all named marine organisms. Representatives of the phylum live in a huge range of habitats including marine, freshwater, and terrestrial environments. Molluscs are a highly diverse group, in size, in anatomical structure, in behaviour and in habitat.