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3 days ago · Insects can have hinge joints to allow and back and forth motion. They can also have ball and socket joints to allow for rotation. The joints are made of leathery chitin to retain flexibility and motility. Insect Abdomen. The final of the three main segments of an insect is the abdomen.
- Exoskeleton
- Setae
- Coloration
- Senses
- Pheromones
- Brain
- Eyes
- Simple Eyes
- Hearing
- Antennae
The exoskeleton, sometimes called the cuticle, covers the entire outer body of an insect; there’s no interior skeleton. Made of a polysaccharide derived from glucose, and called chitin, it protects a completely soft interior. The chitin can be firm or yielding, depending on its thickness. So, while an insect’s face and legs have thin layers to allo...
Setae (sing. seta), cover the entire body of most species. They often look like hair, but are actually chitin, like the rest of the insect’s exoskeleton, and can take several forms, including hairy-looking, bristly, and spiny. Setae may also be widened and flattened into scales, like those on the wings of butterflies and moths. Most setae are attac...
Insects produce colors in nearly every hue imaginable, sometimes in spectacular fashion, like some of the scarab beetles and butterflies. The colors are produced in several different ways: Some are the result of ordinary pigments, mainly melanin, which don’t change. But others result from light waves that refract (bend) after striking microscopic r...
Most insects have five senses, but they don’t detect stimuli in the same way humans do. For instance, they don’t have an actual nose, but they do have sensory organs all over their body that serve the same purpose. Insects can: 1. See, using compound eyes for visual resolution, and ocelli for light detection. 2. “Hear” through the movement of recep...
A means of communication among insects is with organic compounds called pheromones (scents). They’re messages that elicit responses from other members of the same species: there’s food over here; come mate with me; stay away from my eggs; help me fight this predator; flee; and more. The pheromones are released through glands located in several plac...
The brain, tiny as it is, can process myriad bits of input, and direct actions to the rest of the body. And, it has a human-like mid-brain structure (although more basic) that demonstrates levels of consciousness! Research suggests that they probably don’t feel grief or jealousy, but they may feel something like hunger and pain, and perhaps a sort ...
Most adult insects have two large compound eyes. They’re comprised of hundreds or even thousands of tiny lenses. Each lens (ommatidium) is connected to an optic nerve and faces a single direction, one that’s just a tad different from all the others. The brain receives and interprets visual input from all of them to form a complete picture. Compound...
In addition to their compound eyes, all adult insects have two or three tiny “simple eyes,” called ocelli (oh-CELL-ee). They have only one lens each, and can’t focus. Located at the top or front of the head (the position varies), their job is to detect the intensity of light and dark. Immature insects—known variously as nymphs, caterpillars, naiads...
Insects don’t have ears, but that doesn’t mean they can’t “hear,” in their own way. Sound waves create vibrations, and insects can detect them through sensory organs attached to stiff hairs scattered here and there on their body. Some species also have these organs on their antennae. A few, including cicadas, grasshoppers, and moths, have a thin ty...
The head has two antennae (an-TEN-ee), with three (some flies) up to 140 (cockroaches) muscled segments. The antennae (singular: antenna) serve as primary sense organs for smell, taste, touch, temperature, humidity, and pressure. They’re flexible and highly varied: long, short or stubby, feathery, bristly, thin, straight, or hair-like. Some even re...
Jan 17, 2020 · Perhaps the most obvious one is that plant cells have a cell wall. The cell wall provides strength and support to the plant, much like the exoskeleton exoskeleton of an insect or spider. Our skeletons are inside our bodies, rather than on the outside like insects or spiders.
Larger hairs, bristles, and scales (called setae or macrotrichae) are the product of two specialized epidermal cells: a trichogen cell (the hair shaft) and a tormogen cell (the socket). Multicellular projections of the exoskeleton are called spines (or spurs, if movable).
Jul 31, 2019 · Plant cells have cell walls and chloroplasts while animal cells do not; plant cells have large vacuoles, while animal cells either have small ones or no vacuoles. Many similarities exist between plant and animal cells, and they have three key differences as well.
- Rebecca E.
Jan 17, 2019 · Insects don't have veins or arteries, but they do have circulatory systems. When blood is moved without the aid of vessels, the organism has an open circulatory system. Insect blood, properly called hemolymph, flows freely through the body cavity and makes direct contact with organs and tissues.
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Insect physiology includes the physiology and biochemistry of insect organ systems. [1] Although diverse, insects are quite similar in overall design, internally and externally. The insect is made up of three main body regions (tagmata), the head, thorax and abdomen.
