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Clava Hand-club
Clava can refer to: * Mu Boötis, a triple star system in the constellation Boötes * Clava cairn, a type of Bronze Age circular chamber tomb cairn * Gracile nucleus The dorsal column nuclei are a pair of nuclei in the dorsal columns of the dorsal column–medial lemniscus pathway (DCML) in the brainstem. The name refers collectively to the cuneate nucleus and gracile nucleus, which are situated at the lo ..., an area of the brain that participate in the sensation of fine touch and proprioception of the lower body * The club-like segments at the end of some insect antennae * ''Clava'' (cnidarian), a genus of marine hydroid {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mu Boötis
Mu Boötis is a binary star in the northern constellation of Boötes. Its name is a Bayer designation that is Latinized from μ Boötis, and abbreviated Mu Boo or μ Boo. This system had the traditional name Alkalurops, pronounced . Based on parallax measurements, these stars are located at a distance of 123 light-years. It makes an optical double with Mu2 Boötis, 109" away, which is an unrelated star system passing close to Mu Boötis. Properties The components of the system have an angular separation of . They form a spectroscopic binary system with an orbital period of 3.75 years. The visible component is a yellow-white F-type subgiant with an apparent magnitude of +4.31. Additional components More far away there is μ2 Boötis, a double star whose components are separated by . It is a probable binary star system with an apparent magnitude of +6.51. Their spectral classification of G1V matches a G-type main-sequence star. The components of μ2 Boötis have ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clava Cairn
The Clava cairn is a type of Bronze Age circular chamber tomb cairn, named after the group of three cairns at Balnuaran of Clava, to the east of Inverness in Scotland. There are about 50 cairns of this type in an area round about Inverness. They fall into two sub-types, one typically consisting of a corbelled passage grave with a single burial chamber linked to the entrance by a short passage and covered with a cairn of stones, with the entrances oriented south west towards midwinter sunset. In the other sub-type an annular ring cairn encloses an apparently unroofed area with no formal means of access from the outside. In both sub-types a stone circle surrounds the whole tomb and a kerb often runs around the cairn. The heights of the standing stones vary in height so that the tallest fringe the entrance (oriented south west) and the shortest are directly opposite it. When Clava-type tombs still contained burial remains, only one or two bodies appear to have been buried in each, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gracile Nucleus
The dorsal column nuclei are a pair of nuclei in the dorsal columns of the dorsal column–medial lemniscus pathway (DCML) in the brainstem. The name refers collectively to the cuneate nucleus and gracile nucleus, which are situated at the lower end of the medulla oblongata. Both nuclei contain second-order neurons of the DCML, which convey fine touch and proprioceptive information from the body to the brain via the thalamus. Structure Nerve pathways The dorsal column nuclei each have an associated nerve tract in the spinal cord, the gracile fasciculus and the cuneate fasciculus, together forming the dorsal columns. Both dorsal column nuclei contain synapses from afferent nerve fibers that have travelled in the spinal cord. They then send on second-order neurons of the dorsal column–medial lemniscal pathway. Neurons of the dorsal column nuclei eventually reach the midbrain and the thalamus. They send axons that form the internal arcuate fibers. These cross over at t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insect Morphology
Insect morphology is the study and description of the morphology (biology), physical form of insects. The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), three pairs of legs, and mouthparts located ''outside'' of the #Head, head capsule. This position of the mouthparts divides them from their closest relatives, the non-insect Hexapoda, hexapods, which include Protura, Diplura, and Collembola. There is enormous variation in body structure amongst insect species. Individuals can range from 0.3 mm (fairyfly, fairyflies) to 30 cm across (Thysania agrippina, great owlet moth); have no eyes or many; well-developed wings or none; and legs modified for running, jumping, swimming, or even digging. These modifications allow insects to occupy almost every ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
