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Korean Skate
The Korean skate (''Hongeo koreana'') is a skate in the family Rajidae, and is the sole member of the genus ''Hongeo''. It was previously classified in the genus ''Raja'' as ''Raja koreana'' until discoveries identified this species as a member of a distinct genus. It is considered Critically Endangered on the IUCN Red List due to overexploitation. Taxonomy and systematics Mitochondrial genome The complete mitochondrial genome was investigated in 2014. The genome is 16,906 base pairs in length, and contains 2 rRNA, 22 tRNA, and 13 protein coding genes. The genome has the same gene order and structure as genomes of the other Rajidae species, which is the family that ''Hongeo koreana'' belongs to. Etymology *''Hongeo'' comes from the Korean word for 'skate', (). *''koreana'' comes from its geographic range in the Korean waters where it was collected. Description The Korean skate has a relatively short, deep snout that is slightly obtuse. Its mouth is weakly arched and large, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudal Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod to lu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsushima Island
is an island of the Japanese archipelago situated in-between the Tsushima Strait and Korea Strait, approximately halfway between Kyushu and the Korean Peninsula. The main island of Tsushima, once a single island, was divided into two in 1671 by the Ōfunakoshiseto canal and into three in 1900 by the Manzekiseto canal. These canals were driven through isthmuses in the center of the island, forming "North Tsushima Island" (Kamino-shima) and "South Tsushima Island" ( Shimono-shima). Tsushima also incorporates over 100 smaller islands, many tiny. The name ''Tsushima'' generally refers to all the islands of the Tsushima archipelago collectively. Administratively, Tsushima Island is in Nagasaki Prefecture. The island group measures about by and had a population of about 34,000 . The main islands (that is, the "North" and "South" islands, and the thin island that connects them) are the largest coherent satellite island group of Nagasaki Prefecture and the eighth-largest in Japan. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans Japanese archipelago, an archipelago of List of islands of Japan, 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa Island, Okinawa. Tokyo is the Capital of Japan, nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the List of countries and dependencies by population, eleventh most populous country in the world, as well as one of the List of countries and dependencies by population density, most densely populated and Urbanization by country, urbanized. About three-fourths of Geography of Japan, the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheongsando
Cheongsando (hangul: 청산도) is an island off the south coast of the Republic of Korea, being the main island of Cheongsan-myeon, Wando County, South Jeolla Province. Accompanied by the four inhabited islands of Daemodo, Somodo, Yeoseodo, and Jangdo and several uninhabited islands, it is called Cheongsando ('green mountain island') because it remains green through four seasons. It has long been called Seonsan or Seonwon, meaning that a Taoist hermit dwells on the island because of the beautiful view which creates a harmony with the clear and blue archipelago. Transportation Passenger ferry A ferry that carries vehicles operates five times a day between Wando Port in Wando County and Cheongsando Port, taking 50 minutes for each travel. In April and May with Cheongsando Slow Walking Festival is under way, 8 voyages are available on weekdays and 15 voyages are available on weekend. Village bus Every day, village bus runs five times from Cheongsando Port to Jinsan-ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heuksan Islands
Heuksando is an island in the Yellow Sea located off 97.2 km from the southwest coast of Mokpo, Jeollanam-do, South Korea. It covers an area of 19.7 km2 and consists of several peaks: Munamsan (문암산/ 400m), Gitdaebong (깃대봉/ 378m), Seonyubong (선유봉/ 300m), Sangnasan (상라산/ 227m). It is within the administrative boundaries of Sinan County, Jeollanam-do, South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ... since 1969. The island's 19.7 km2 are home to about 3,133 people. Climate Gallery Image:Korea-Heuksando Island-02.jpg Image:Korea-Heuksando Island-03.jpg Image:Korea-Heuksando Island-06.jpg Image:Korea-Heuksando Island-10.jpg See also * Jang Bo-go * Islands of South Korea References External links *www.heuksando.com Sinan Count ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeju Strait
Jeju Strait is a strait between the Korean Peninsula (South Jeolla Province) and Jeju Island (Jeju Province). The strait is the boundary between the Sea of Japan and the Yellow Sea as defined by the International Hydrographic Organization, and is considered part of the East China Sea in Korea. Ecology The Kuroshio current, a north-flowing ocean current, results in warm water all year round. See also * Jeju Undersea Tunnel * Korea Strait ** Eastern Channel * Sea of Japan * Namhae * Yellow Sea The Yellow Sea is a marginal sea of the Western Pacific Ocean located between mainland China and the Korean Peninsula, and can be considered the northwestern part of the East China Sea. It is one of four seas named after common colour ter ... * East China Sea References Straits of South Korea {{SouthKorea-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean Peninsula
Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic of Korea) comprising its southern half. Korea consists of the Korean Peninsula, Jeju Island, and several minor islands near the peninsula. The peninsula is bordered by China to the northwest and Russia to the northeast. It is separated from Japan to the east by the Korea Strait and the Sea of Japan (East Sea). During the first half of the 1st millennium, Korea was divided between three states, Goguryeo, Baekje, and Silla, together known as the Three Kingdoms of Korea. In the second half of the 1st millennium, Silla defeated and conquered Baekje and Goguryeo, leading to the "Unified Silla" period. Meanwhile, Balhae formed in the north, superseding former Goguryeo. Unified Silla eventually collapsed into three separate states due to civi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anterior
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. Additionally, for some animals such as invertebrates, some terms may not have any meaning at all; for example, an animal that is radially symmetrical will have no anterior surface, but can still have a description that a part is close to the middle ("proximal") or further from the middle ("distal"). International organisations have determined vocabularies that are often used as standard vocabularies for subdisciplines of anatomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncalcified
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Neurocranium
In human anatomy, the neurocranium, also known as the braincase, brainpan, or brain-pan is the upper and back part of the skull, which forms a protective case around the brain. In the human skull, the neurocranium includes the calvaria (skull), calvaria or skullcap. The remainder of the skull is the facial skeleton. In comparative anatomy, neurocranium is sometimes used synonymously with endocranium or chondrocranium. Structure The neurocranium is divided into two portions: * the membranous part, consisting of flat bones, which surround the brain; and * the cartilaginous part, or chondrocranium, which forms bones of the base of the skull. In humans, the neurocranium is usually considered to include the following eight bones: * 1 ethmoid bone * 1 frontal bone * 1 occipital bone * 2 parietal bones * 1 sphenoid bone * 2 temporal bones The ossicles (three on each side) are usually not included as bones of the neurocranium. There may variably also be extra sutural bones present. B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cartilage
Cartilage is a resilient and smooth type of connective tissue. In tetrapods, it covers and protects the ends of long bones at the joints as articular cartilage, and is a structural component of many body parts including the rib cage, the neck and the bronchial tubes, and the intervertebral discs. In other taxa, such as chondrichthyans, but also in cyclostomes, it may constitute a much greater proportion of the skeleton. It is not as hard and rigid as bone, but it is much stiffer and much less flexible than muscle. The matrix of cartilage is made up of glycosaminoglycans, proteoglycans, collagen fibers and, sometimes, elastin. Because of its rigidity, cartilage often serves the purpose of holding tubes open in the body. Examples include the rings of the trachea, such as the cricoid cartilage and carina. Cartilage is composed of specialized cells called chondrocytes that produce a large amount of collagenous extracellular matrix, abundant ground substance that is rich in pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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