The urinary system serves for the removal of harmful and useless materials from the body.
Bones of the lower limbs are connected to the trunk by the pelvic girdle.
The bones of the upper limbs form the pectoral girdle and the arms.
The two main parts of the central nervous system, the brain and the spinal cord are protected by the skull and the spinal column.
The arms are moved by flexor and extensor muscles.
Viena iš deguoninių azoto rūgščių. Bespalvė, vidutinio stiprumo, aštraus kvapo rūgštis, egzistuojanti tik vandeniniame tirpale.
Junginys, kuris susidaro ore degant fosforui, ir atrodo kaip balti dūmai.
Vėjo jėgainės kinetinę vėjo energiją paverčia elektros energija.
Robert Fulton American engineer created the first operational steam-powered ship.
The German triplane was perhaps the best known plane in World War I.
Schooners, first built in the Netherlands in the 17th century, were mainly used as merchant ships.
Metalai, turintys heksagoninę metalinę gardelę, yra kieti ir sunkiai apdirbami.
From the 1940s, the increasingly large aircraft carriers became the masters of the oceans.
A bireme is a type of ancient warship, with a characteristic pointed bow and two decks of oars, used by many armies.
Tankiausios sanglaudos kristalinė gardelė.
Kubinėje centruotojo tūrio kristalinėje gardelėje metalo atomai yra tankiausioje sanglaudoje.
Viduramžiais valstiečių namai buvo paprastos konstrukcijos, vieno aukšto pastatai, pastatyti iš žemės, purvo ir medžio.
Hablo kosminio teleskopo darbas neturi įtakos atmosferai.
DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.
Žemynai dreifavo per visą Žemės istoriją. Šis procesas tęsiasi ir šiuo metu.
HMS Dreadnought revolutionised battleship-building in the 20th century.
A sphere is the set of points which are all within the same distance from a given point in space.
This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.