Examlex
The element ________ is the most similar to helium in chemical and physical properties.
Flatworms
A group of invertebrates belonging to the phylum Platyhelminthes, known for their flat bodies and absence of body cavity.
Malpighian Tubules
Excretory structures found in some arthropods, including insects and spiders, that remove waste products from the blood and excrete them into the digestive tract.
Nephridia
Excretory organs in many invertebrates, functioning in the elimination of metabolic wastes.
Insects
Small arthropods with a chitinous exoskeleton, three-part body, three pairs of jointed legs, compound eyes, and one pair of antennae.
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