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Gracile
Gracility is slenderness, the condition of being gracile, which means slender. It derives from the Latin adjective ''gracilis'' (masculine or feminine), or ''gracile'' ( neuter), which in either form means slender, and when transferred for example to discourse takes the sense of "without ornament", "simple" or various similar connotations. In ''Glossary of Botanic Terms'', B. D. Jackson speaks dismissively of an entry in earlier dictionary of A. A. Crozier as follows: ''Gracilis (Lat.), slender. Crozier has the needless word "gracile"''. However, his objection would be hard to sustain in current usage; apart from the fact that ''gracile'' is a natural and convenient term, it is hardly a neologism. The ''Shorter Oxford English Dictionary'' gives the source date for that usage as 1623 and indicates the word is misused (through association with ''grace'') for Gracefully slender." This misuse is unfortunate at least, because the terms ''gracile'' and ''grace'' are unrelated: the etym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gracile Fasciculus
Gracility is slenderness, the condition of being gracile, which means slender. It derives from the Latin adjective ''gracilis'' (masculine or feminine), or ''gracile'' ( neuter), which in either form means slender, and when transferred for example to discourse takes the sense of "without ornament", "simple" or various similar connotations. In ''Glossary of Botanic Terms'', B. D. Jackson speaks dismissively of an entry in earlier dictionary of A. A. Crozier as follows: ''Gracilis (Lat.), slender. Crozier has the needless word "gracile"''. However, his objection would be hard to sustain in current usage; apart from the fact that ''gracile'' is a natural and convenient term, it is hardly a neologism. The ''Shorter Oxford English Dictionary'' gives the source date for that usage as 1623 and indicates the word is misused (through association with ''grace'') for Gracefully slender." This misuse is unfortunate at least, because the terms ''gracile'' and ''grace'' are unrelated: the etym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gracile Nucleus
In neuroanatomy, the dorsal column nuclei are a pair of nuclei in the dorsal columns in the brainstem. The name refers collectively to the cuneate nucleus and gracile nucleus, which are present at the bottom of the medulla oblongata. Both nuclei contain second-order neurons of the dorsal column–medial lemniscus pathway, which carries fine touch and proprioceptive information from the body to the brain. Fibres reach 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. 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 the sensory decussation to form th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robustness (morphology)
In biology, robustness is used to describe a taxon with a stronger and heavier build (morphology) when compared to a related gracile taxon. The terms are used in contrast to one another. The term is used by physical anthropologists and paleoanthropologists to refer to a big-boned and muscular body. For example, members of the genus ''Sapajus'' have robust body types and are called the robust capuchin monkeys while members of the genus ''Cebus'' have gracile body types and are called the gracile capuchin monkeys. Male and female members of the same species may display sexual dimorphism and have robust and gracile morphologies. The terms "robust" vs. "gracile" are used in the context of human evolution, to distinguish: *"robust" vs. "gracile" australopithecines, see '' Paranthropus'' *"robust" archaic humans vs. "gracile" anatomically modern humans *"robust" early modern humans (Cro-Magnon) vs. "gracile" Epipaleolithic In archaeology, the Epipalaeolithic or Epipaleolithic (some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eriophorum Gracile
''Eriophorum gracile'' is a species of flowering plant in the sedge family, Cyperaceae. It is known by the common name slender cottongrass, or slender cottonsedge. Eriophorum gracile is a plant with circumboreal distribution, extending south into mountain ranges of the Northern Hemisphere. It grows in wet areas such as bogs. ''Eriophorum gracile'' is a thin, tall perennial herb with a slender, rounded, solid, mostly naked stem reaching 30 to 60 centimeters in height. It produces a fluffy inflorescence atop its stem with a wispy, cottony white flower. The plants grow in colonies, often spreading vegetatively Vegetative reproduction (also known as vegetative propagation, vegetative multiplication or cloning) is any form of asexual reproduction occurring in plants in which a new plant grows from a fragment or cutting of the parent plant or spec ... by rhizome. References External linksJepson Manual Treatment gracile Plants described in 1799 Flora of Asia Flora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medulla Oblongata
The medulla oblongata or simply medulla is a long stem-like structure which makes up the lower part of the brainstem. It is anterior and partially inferior to the cerebellum. It is a cone-shaped neuronal mass responsible for autonomic (involuntary) functions, ranging from vomiting to sneezing. The medulla contains the cardiac, respiratory, vomiting and vasomotor centers, and therefore deals with the autonomic functions of breathing, heart rate and blood pressure as well as the sleep–wake cycle. During embryonic development, the medulla oblongata develops from the myelencephalon. The myelencephalon is a secondary vesicle which forms during the maturation of the rhombencephalon, also referred to as the hindbrain. The bulb is an archaic term for the medulla oblongata. In modern clinical usage, the word bulbar (as in bulbar palsy) is retained for terms that relate to the medulla oblongata, particularly in reference to medical conditions. The word bulbar can refer to the nerves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GRACILE Syndrome
GRACILE syndrome is a very rare lethal autosomal recessive genetic disorder, one of the Finnish heritage diseases. GRACILE syndrome has also been found in the UK and Sweden, but not nearly as much as in Finland. It is caused by a mutation in the '' BCS1L'' gene and it occurs in approximately 1 out of 50,000 live births in Finnish people. To date, there have only been 32 cases of GRACILE syndrome reported. GRACILE is an acronym for growth retardation, aminoaciduria (amino acids in the urine), cholestasis, iron overload, lactic acidosis and early death. Prior to birth, the growth of the fetus is abnormally slow. This slow growth leads to a smaller than average newborn that has difficulty growing at a normal rate. Signs and symptoms People with GRACILE syndrome can have a wide range of symptoms, but that does not mean every person affected will have the same symptoms as one another It has been determined that 80% - 99% of people with GRACILE syndrome have at least one of these: * C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moeritherium
''Moeritherium'' ("the beast from Lake Moeris") is an extinct genus of primitive proboscideans. These prehistoric mammals are related to the elephant and, more distantly, sea cows and hyraxes Hyraxes (), also called dassies, are small, thickset, herbivorous mammals in the order Hyracoidea. Hyraxes are well-furred, rotund animals with short tails. Typically, they measure between long and weigh between . They are superficially simi .... They lived during the Eocene epoch. Description ''Moeritherium'' was a rotund semi-aquatic mammal with short, stubby legs that lived about 37-35 million years agoDan Koehl, Koehl, D. 200The genus ''Moeritherium'', ancestor of elephants.Downloaded on 6 December 2006. Its body shape and lifestyle demonstrate convergent evolution with pigs, tapirs, and the pygmy hippopotamus. ''Moeritherium'' was smaller than most or all later proboscideans, standing only high at the shoulder and weighing . The shape of their teeth suggests that they ate soft w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ctenochasma
''Ctenochasma'' (meaning "comb jaw") is a genus of Late Jurassic ctenochasmatid pterosaur belonging to the suborder Pterodactyloidea. Three species are currently recognized: ''C. roemeri'' (named after Friedrich Adolph Roemer), ''C. taqueti'', and ''C. elegans''. Their fossilized remains have been found in the Solnhofen Limestone of Bavaria, Germany, the "Purbeck Group" of northeastern Germany, and the Calcaires tâchetés of eastern France. History The name ''Ctenochasma'' was coined by the German paleontologist Christian Erich Hermann von Meyer in 1852, based on a single lower jaw full of closely packed teeth which he gave the species name ''Ctenochasma roemeri''.von Meyer, C.E.H. (1852). "''Ctenochasma Roemeri''." ''Paläontographica'', 2: 82–84 & pl. 13. A second species, ''C. gracile'', was named by Oppel in 1862 based on a fragmentary skull.Oppel A. (1862). "Über Fährten im lithographischen Schiefer. Paläontologische Mitteilungen aus dem Museum des Koenigl." Bayris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melampodium
''Melampodium'' is a genus of flowering plants in the sunflower family. These are rugged plants native to the tropical to subtropical regions that include Central America, Southwestern United States, California, Florida, the Caribbean, and South America. Most of the species can be found in Mexico, five in the Southwestern United States, and three are scattered in Colombia and Brazil. Some sources say that the name ''Melampodium'' is derived from the Greek words μέλας (''melas''), meaning "black", and πόδιον (''podion''), meaning "foot". This refers to the color of the base of the stem and roots. Members of the genus are commonly known as blackfoots. Other authorities, however, maintain that this is in error, that the name comes from Melampus, a soothsayer of renown in Greek mythology. The genus consists of annuals and perennials or bushy plants, growing to a height of 1 m. When fully grown, they tend to fall over. They like average, well-drained soil, but can equall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterosaur
Pterosaurs (; from Greek ''pteron'' and ''sauros'', meaning "wing lizard") is an extinct clade of flying reptiles in the order, Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 to 66 million years ago). Pterosaurs are the earliest vertebrates known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the ankles to a dramatically lengthened fourth finger. There were two major types of pterosaurs. Basal pterosaurs (also called 'non-pterodactyloid pterosaurs' or 'rhamphorhynchoids') were smaller animals with fully toothed jaws and, typically, long tails. Their wide wing membranes probably included and connected the hind legs. On the ground, they would have had an awkward sprawling posture, but the anatomy of their joints and strong claws would have made them effective climbers, and some may have even lived in trees. Basal pterosaurs were insectiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedge
The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' with over 2,000 species. These species are widely distributed, with the centers of diversity for the group occurring in tropical Asia and tropical South America. While sedges may be found growing in almost all environments, many are associated with wetlands, or with poor soils. Ecological communities dominated by sedges are known as sedgelands or sedge meadows. Some species superficially resemble the closely related rushes and the more distantly related grasses. Features distinguishing members of the sedge family from grasses or rushes are stems with triangular cross-sections (with occasional exceptions, a notable example being the tule which has a round cross-section) and leaves that are spirally arranged in three ranks. In comparison, g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyperaceae
The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' with over 2,000 species. These species are widely distributed, with the centers of diversity for the group occurring in tropical Asia and tropical South America. While sedges may be found growing in almost all environments, many are associated with wetlands, or with poor soils. Ecological communities dominated by sedges are known as sedgelands or sedge meadows. Some species superficially resemble the closely related rushes and the more distantly related grasses. Features distinguishing members of the sedge family from grasses or rushes are stems with triangular cross-sections (with occasional exceptions, a notable example being the tule which has a round cross-section) and leaves that are spirally arranged in three ranks. In comparison, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
