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Studies Of The Fetus In The Womb
''Studies of the Fetus in the Womb'' are two colored annotated sketches by Leonardo da Vinci made in around 1511. The studies correctly depict the human fetus in its proper position inside a dissected uterus. Leonardo depicted the uterus with one chamber, in contrast to theories that the uterus had multiple chambers which many believed divided fetuses into separate compartments in the case of twins. Leonardo also correctly drew the uterine artery and the vascular system of the cervix and vagina. Preparation and the studies Leonardo studied human embryology with the help of anatomist Marcantonio della Torre and saw the fetus within a cadaver. The first study, measuring 30.5×22 cm, shows the fetus in a breech position inside a dissected uterus. Leonardo mistakenly depicted the cotyledons in the vascular walls of the human uterus that he had previously found in a cow uterus. The other study, measuring 30.3×22 cm, shows female external genitalia, the supposed arrangement of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonardo Da Vinci
Leonardo di ser Piero da Vinci (15 April 14522 May 1519) was an Italian polymath of the High Renaissance who was active as a painter, Drawing, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially rested on his achievements as a painter, he also became known for #Journals and notes, his notebooks, in which he made drawings and notes on a variety of subjects, including anatomy, astronomy, botany, cartography, painting, and paleontology. Leonardo is widely regarded to have been a genius who epitomized the Renaissance humanism, Renaissance humanist ideal, and his List of works by Leonardo da Vinci, collective works comprise a contribution to later generations of artists matched only by that of his younger contemporary, Michelangelo. Born Legitimacy (family law), out of wedlock to a successful Civil law notary, notary and a lower-class woman in, or near, Vinci, Tuscany, Vinci, he was educated in Florence by the Italian painter and sculptor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Female External Genitalia
A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction. The reproductive organs together constitute the reproductive system. In animals, the testis in the male, and the ovary in the female, are called the ''primary sex organs''. All others are called ''secondary sex organs'', divided between the external sex organs—the genitals or external genitalia, visible at birth in both sexes—and the internal sex organs. Mosses, ferns, and some similar plants have gametangia for reproductive organs, which are part of the gametophyte. The flowers of flowering plants produce pollen and egg cells, but the sex organs themselves are inside the gametophytes within the pollen and the ovule. Conifer, Coniferous plants likewise produce their sexually reproductive structures within the gametophytes contained within the Conifer cone, cones and pollen. The cones and pollen are not themselves sexual organs. Terminology The ''primary sex organs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1510s Drawings
Year 151 (CLI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Condianus and Valerius (or, less frequently, year 904 ''Ab urbe condita''). The denomination 151 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Asia * Mytilene and Smyrna are destroyed by an earthquake. * First year of Yuanjia of the Chinese Han Dynasty. By topic Art * Detail from a rubbing of a stone relief in Wu family shrine (Wuliangci), Jiaxiang, Shandong, is made (Han dynasty). Births * Annia Galeria Aurelia Faustina, daughter of Marcus Aurelius * Zhong Yao, Chinese official and calligrapher (d. 230) Deaths * Kanishka, Indian ruler of the Kushan Empire * Novatus Saint Novatus (died c. 151) is an early Christian saint. His feast day is 20 June. Novatus and hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embryology
Embryology (from Greek ἔμβρυον, ''embryon'', "the unborn, embryo"; and -λογία, '' -logia'') is the branch of animal biology that studies the prenatal development of gametes (sex cells), fertilization, and development of embryos and fetuses. Additionally, embryology encompasses the study of congenital disorders that occur before birth, known as teratology. Early embryology was proposed by Marcello Malpighi, and known as preformationism, the theory that organisms develop from pre-existing miniature versions of themselves. Aristotle proposed the theory that is now accepted, epigenesis. Epigenesis is the idea that organisms develop from seed or egg in a sequence of steps. Modern embryology, developed from the work of Karl Ernst von Baer, though accurate observations had been made in Italy by anatomists such as Aldrovandi and Leonardo da Vinci in the Renaissance. Comparative embryology Preformationism and epigenesis As recently as the 18th century, the prevailin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drawings By Leonardo Da Vinci
Drawing is a visual art that uses an instrument to mark paper or another two-dimensional surface. The instruments used to make a drawing are pencils, crayons, pens with inks, brushes with paints, or combinations of these, and in more modern times, computer styluses with graphics tablets or gamepads in VR drawing software. A drawing instrument releases a small amount of material onto a surface, leaving a visible mark. The most common support for drawing is paper, although other materials, such as cardboard, vellum, wood, plastic, leather, canvas, and board, have been used. Temporary drawings may be made on a blackboard or whiteboard. Drawing has been a popular and fundamental means of public expression throughout human history. It is one of the simplest and most efficient means of communicating ideas. The wide availability of drawing instruments makes drawing one of the most common artistic activities. In addition to its more artistic forms, drawing is frequently used in commer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Works By Leonardo Da Vinci
The Italian polymath Leonardo da Vinci (1452–1519) was the founding figure of the High Renaissance, and exhibited enormous influence on subsequent artists. Only around eight major works—''The Adoration of the Magi'', '' Saint Jerome in the Wilderness'', the Louvre ''Virgin of the Rocks'', ''The Last Supper'', the ceiling of the Sala delle Asse, '' The Virgin and Child with Saint Anne and Saint John the Baptist'', '' The Virgin and Child with Saint Anne'' and the ''Mona Lisa''—are universally attributed to him, and have aroused little or no controversy in the past. Ten additional works are now widely attributed to his ''oeuvre'', though most have previously incited considerable controversy or doubt: the ''Annunciation'', ''Madonna of the Carnation'', '' The Baptism of Christ'' (with his teacher, Verrocchio), ''Ginevra de' Benci'', the ''Benois Madonna'', the ''Portrait of a Musician'' (with possible studio assistance), the ''Lady with an Ermine'', ''La Belle Ferronnière'', th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Howard, 2nd Earl Of Arundel
Thomas Howard, 14th Earl of Arundel KG, (7 July 1585 – 4 October 1646) was a prominent English courtier during the reigns of King James I and King Charles I, but he made his name as a Grand Tourist and art collector rather than as a politician. When he died he possessed 700 paintings, along with large collections of sculptures, books, prints, drawings, and antique jewellery. Most of his collection of marble carvings, known as the Arundel marbles, was eventually left to the University of Oxford. He is sometimes referred to as the 21st Earl of Arundel, ignoring the supposed second creation of 1289, or the 2nd Earl of Arundel, the latter numbering depending on whether one views the earldom obtained by his father as a new creation or not. He was also 2nd or 4th Earl of Surrey; and was later created 1st Earl of Norfolk (5th creation). He is also known as "the Collector Earl". Early life and restoration to titles Arundel was born in relative penury, at Finchingfield in Essex on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pompeo Leoni
:''For the early 17th-century composer, see Leone Leoni (composer)''. Leone Leoni (ca. 1509 – 22 July 1590) was an Italian sculptor of international outlook who travelled in Italy, Germany, Austria, France, Spain and the Netherlands. Leoni is regarded as the finest of the ''Cinquecento'' medallists. He made his reputation in commissions he received from the Habsburg monarchs Charles V, Holy Roman Emperor and Philip II of Spain. His usual medium was bronze, although he also worked in marble and alabaster, carved gemstones and probably left some finished work in wax (in which many of his sculptures were modelled), as well as designing coins. He mainly produced portraits, and was repeatedly used by the Spanish, and also the Austrian, Habsburgs. Biography His family origins were at Arezzo, though he was probably born at Menaggio near Lake Como, and his early training, to judge from the finish of his medals, was with a medallist or goldsmith, as Vasari says. His earliest docu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francesco Melzi
Francesco Melzi, or Francesco de Melzi (1491–1570), was an Italian painter born into a family of the Milanese nobility in Lombardy. He became a pupil of Leonardo da Vinci and remained as his closest professional assistant throughout his career. After da Vinci's death he became the literary executor of all da Vinci's papers, editing them into a manuscript on painting he published as ''Tratatto della Pittura'' reatise on Paintingor a compilation entitled the ''Codex Urbinas''. Early life and training Francesco's father, Gerolamo Melzi, was an engineer for Francesco II Sforza's military, and a captain in the militia in Milan under Louis XII. Francesco lived with his family in the Villa Melzi in Vaprio d'Adda (not to be confused with the Villa Melzi d'Eril in Bellagio, Lombardy), which today is still under the ownership of the Dukes Melzi d'Eril. Francesco grew up in the Milanese court, and was raised with proper manners and was granted a good education, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umbilical Cord
In placental mammals, the umbilical cord (also called the navel string, birth cord or ''funiculus umbilicalis'') is a conduit between the developing embryo or fetus and the placenta. During prenatal development, the umbilical cord is physiologically and genetically part of the fetus and (in humans) normally contains two arteries (the umbilical arteries) and one vein (the umbilical vein), buried within Wharton's jelly. The umbilical vein supplies the fetus with oxygenated, nutrient-rich blood from the placenta. Conversely, the fetal heart pumps low-oxygen, nutrient-depleted blood through the umbilical arteries back to the placenta. Structure and development The umbilical cord develops from and contains remnants of the yolk sac and allantois. It forms by the fifth week of development, replacing the yolk sac as the source of nutrients for the embryo. The cord is not directly connected to the mother's circulatory system, but instead joins the placenta, which transfers materials t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placental Cotyledon
The placenta of humans, and certain other mammals contains structures known as cotyledons, which transmit fetal blood and allow exchange of oxygen and nutrients with the maternal blood. Ruminants The Artiodactyla have a cotyledonary placenta. In this form of placenta the chorionic villi form a number of separate circular structures (''cotyledons'') which are distributed over the surface of the chorionic sac. Sheep, goats and cattle have between 72 and 125 cotyledons whereas deer have 4-6 larger cotyledons. Human The form of the human placenta is generally classified as a discoid placenta. Within this the ''cotyledons'' are the approximately 15-25 separations of the decidua basalis of the placenta, separated by placental septa The Southeastern Pennsylvania Transportation Authority (SEPTA) is a regional public transportation authority that operates bus, rapid transit, commuter rail, light rail, and electric trolleybus services for nearly 4 million people in five c ....Pag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sanguine
Sanguine () or red chalk is chalk of a reddish-brown colour, so called because it resembles the colour of dried blood. It has been popular for centuries for drawing (where white chalk only works on coloured paper). The word comes via French from the Italian ''sanguigna'' and originally from the Latin "sanguis". Technique Sanguine lends itself naturally to sketches, life drawings, and rustic scenes. It is ideal for rendering modeling and volume, and human flesh. In the form of wood-cased pencils and manufactured sticks, sanguine may be used similarly to charcoal and pastel. As with pastel, a mid-toned paper may be put to good use. A fixative may be applied to preserve the finished state of the drawing. The pigment used in sanguine sticks comes from red earths such as red ochre. . www.britannica.com. Retrieved August 20, 2016. Sangui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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