Vertebrates
The long column of bones that extends down a vertebrate's back
Spine
The name for frozen water in its solid state
Ice
The process of using food in the body
Digestion
The term for a hard skeleton-like structure on the outside of the body
Exoskeleton
The smallest part in the structure of a living thing
Cell
A category of animal that can live and breathe both on land and in water
Amphibian
The common name for precipitation, water falling from the sky
Rain
The process of using oxygen in the body
Respiration
This group of invertebrates have soft, non-symmetrical bodies, and include sea sponges
Porifera
The jelly-like substance inside a cell, containing organelles
Cytoplasm
The body part that fish use for swimming
Fins
Another term for water that is safe to drink
Potable water
The system which removes waste from the body
Excretory system
This subset of Arthropods have a body divided into the head, thorax, and abdomen, and typically have 6 legs
Insects
The organelle of a cell that produces energy
Mitochondria
The characteristic which means multiple parts of an animal look exactly the same, either bilateral or radial
Symmetry
97% of water on Earth, including the Oceans, contain this mineral
Salt
The process of blood moving around the body, transporting gases and nutrients to the organs
Circulation
A type of mollusc which has a two-sided shell, for example clams or mussels
Bivalves
The central structure of a Eukaryotic cell, containing genetic material
Nucleus
The hard body part on the face of a bird, used as a tool for gathering and eating food
Beak
Water that does not contain salt, found in rivers or lakes
Fresh water
The coordination system made up of neurons and nerve impulses
Nervous system
This group of invertebrates makes up the largest percentage of the animal kingdom
Arthropods
A type of reproduction that produces an exact copy of the original
Asexual reproduction