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They grow through and project through a secondary or accessory cell of a type called a tormogen, which generates the special flexible membrane that connects the base of the seta to the surrounding integument. Depending partly on their form and function, setae may be called hairs, macrotrichia, chaetae, or scales. The setal membrane is not ...
The hairs are either verrucose or warty, which are about 4.5 to 6.5 μm thick with occasionally coiled branches. Lateral seta-like hairs are often also present and have tapered or clavate terminal ends with septate. [13] These hairs break away at maturity with no aerial mycelium.
Trichobothria (singular trichobothrium) are elongate setae ("hairs") present in arachnids, various orders of insects, and myriapods that function in the detection of airborne vibrations and currents, and electrical charge. [1] In 1883, Friedrich Dahl observed that they were deflected by the sound waves from a violin and labelled them 'hearing ...
caption=Setaria distantiflora (A.Rich.) Pilg., herbarium sheet. Setaria is a widespread genus of plants in the grass family. [5] [6] The name is derived from the Latin word seta, meaning "bristle" or "hair", which refers to the bristly spikelets.
A chaeta or cheta (from Ancient Greek χαίτη (khaítē) 'crest, mane, flowing hair'; pl. chaetae) is a chitinous bristle or seta found on annelid worms, although the term is also frequently used to describe similar structures in other invertebrates such as arthropods.
The two front feet of a tokay gecko can withstand 20.1 N of force parallel to the surface with 227 mm 2 of pad area, [4] a force as much as 40 times the gecko's weight. . Scientists have been investigating the secret of this extraordinary adhesion ever since the 19th century, and at least seven possible mechanisms for gecko adhesion have been discussed over the past 17
The interactions between the gecko's feet and the climbing surface are stronger than simple surface area effects. On its feet, the gecko has many microscopic hairs, or setae (singular seta), that increase the Van der Waals forces - the distance-dependent attraction between atoms or molecules - between its feet and the surface.
Two rows of lobes extend laterally outwards from this axis, and there are small upright lobules at the base of each. The entire liverwort is around 1.5 cm wide and 4–9 cm long. There are mucus-covered hairs around the rhizoids and sex organs. [1] The sporophyte rises from around the apex of the lobe, and has a very large seta and relatively ...