Knowra Antenna Antenna An antenna is a paired sensory appendage on the head of many arthropods. It detects environmental cues through specialized receptors and varies widely in form and function.
Antennal sensillum : A microscopic sensory structure on an arthropod antenna that detects chemical, mechanical, thermal, or humidity cues. Sensilla are the receptor-bearing units through which antennae sample their surroundings.
Arthropod : An invertebrate animal with a segmented body, jointed appendages, and an external skeleton. Antennae are paired appendages found across many members of this animal group.
Moth antenna : A moth's paired head appendages, often bearing numerous receptors for detecting odors and pheromones. Feathery or comb-like forms can greatly increase the surface area available for scent detection.
Insect maxillary palp : A sensory appendage attached to an insect's maxilla, often involved in tasting or detecting odors. Palps can resemble small antennae but arise from mouthparts, not the head capsule.
Olfaction : The detection of airborne or dissolved chemicals by sensory receptors. Many antennae detect odors through olfactory receptors concentrated in their sensilla.
Insect : An arthropod with three pairs of legs, a three-part body, and usually one pair of antennae. Insects provide the best-known examples of antennal structure and function.
Honey bee antenna : A honey bee's segmented sensory appendage used to detect odors, touch, temperature, and other cues. Bees use antennal input in communication, navigation, and assessment of nestmates.
Insect compound eye : An insect visual organ composed of many light-sensitive units called ommatidia. Compound eyes detect light patterns, while antennae primarily sample nonvisual cues.
Mechanoreception : The detection of physical forces such as touch, vibration, or movement by sensory cells. Antennal hairs and joints can register contact, airflow, and movement.
Crustacean : An arthropod group that includes crabs, shrimp, and many other mostly aquatic animals. Crustaceans commonly bear two pairs of antennae, unlike insects.
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