Introduction to the Class Insecta
Insects are the most diverse group of organisms on Earth, belonging to the class **Insecta** within the phylum Arthropoda. With over a million described species, insects account for more than half of all known living organisms. Found in almost every habitat, from the highest mountains to deep ocean floors, insects play critical roles in maintaining ecological balance. Insects are vital to biodiversity and contribute significantly to processes like pollination, decomposition, and even as a food source for other animals. Despite their small size, the impact of insects on ecosystems and human life is profound. Characteristics of Insects Insects share several defining characteristics that distinguish them from other arthropods. Their bodies are divided into three main sections: - Head : Contains sensory organs such as antennae and compound eyes, along with the mouthparts. - Thorax : The center section where wings and legs are attached. Most adult insects have three pairs of legs and two pairs of…
