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The solid organs are the liver, pancreas, spleen, kidneys, and adrenal glands. The hollow organs are the stomach, intestines, gallbladder, bladder, and rectum.
The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion. Digestion involves the breakdown of food into smaller and smaller components
The brain has three main parts: · cerebrum. The cerebrum fills up most of your skull. It is involved in remembering, problem solving, thinking, and feeling.
Pregnancy, also known as gestation, is the time during which one or more offspring develops inside a woman’s womb.
Bacteria live on the skin, inside the nose, in the throat, in the mouth, in the vagina, and in the gut. The majority of the bacteria found in the body live in the human gut.
The adult human skeleton usually consists of 206 named bones. These bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The 80 bones of the axial skeleton form the vertical axis of the body
Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells
Characteristic of the vertebrate form, the human body has an internal skeleton that includes a backbone of vertebrae.
The brain has three main parts: · cerebrum. The cerebrum fills up most of your skull. It is involved in remembering, problem solving, thinking, and feeling.
An astroid is a particular mathematical curve: a hypocycloid with four cusps. Specifically, it is the locus of a point on a circle as it rolls inside a fixed circle with four times the radius.
All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets. Exoplanets are very hard to see
A virtual reality headset works because of a physiological concept known as stereopsis.
RMS Titanic was a British passenger liner, operated by the White Star Line, which sank in the North Atlantic Ocean on 15 April 1912 after striking an iceberg
A black hole is a region of spacetime where gravity is so strong that nothing — no particles or even electromagnetic radiation such as light — can escape from it.
Extravehicular activity is any activity done by an astronaut outside a spacecraft beyond the Earth’s appreciable atmosphere.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, being larger than only Mercury. In English, Mars carries the name of the Roman god of war and is often called the “Red Planet”.
The United States detonated two nuclear weapons over the Japanese cities of Hiroshima and Nagasaki on 6 and 9 August 1945, respectively. The two bombings killed between 129,000 and 226,000 people,
A parallel universe, also known as a parallel dimension, alternate universe, or alternate reality, is a hypothetical self-contained plane of existence, co-existing with one’s own. The sum of all potential parallel universes that constitute reality is often called a “multiverse”
The American Civil War was a civil war in the United States between the Union and the Confederacy. The central cause of the war was the status of slavery
The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the naval base at Pearl Harbor in Honolulu, Territory of Hawaii,
The Battle of Waterloo was fought on Sunday, 18 June 1815, near Waterloo in the United Kingdom of the Netherlands, now in Belgium
Ancient Egypt was a civilization of ancient Africa, concentrated along the lower reaches of the Nile River,
Viking warriors fought using long swords and axes. A good sword was handed down from father to son, but Vikings also buried weapons with their owner when he died.
APEX Museum is located in the historic Auburn Avenue area of Atlanta. This museum connects the world with various pieces of African American history
The Acropolis of Athens is an ancient citadel located on a rocky outcrop above the city of Athens and contains the remains of several ancient buildings
Trenches—long, deep ditches dug as protective defenses—are most often associated with World War I
The first manned flight was on November 21, 1783, the passengers were Jean-Francois Pilatre de Rozier and Francois Laurent.
Dinosaurs are a group of reptiles that have lived on Earth for about 245 million years.
A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae, Platanistidae, Iniidae, Pontoporiidae, and the extinct Lipotidae.
Elephants are the largest existing land animals. Three living species are currently recognised: the African bush elephant, the African forest elephant, and the Asian elephant.
The lion is a large cat of the genus Panthera native to Africa and India. It has a muscular, deep-chested body, short, rounded head, round ears, and a hairy tuft at the end of its tail.
A wild animal is an animal that is, well, wild. This means that it isn’t tame and it lives on its own without any help from people.
Penguins are a group of aquatic flightless birds. They live almost exclusively in the southern hemisphere: only one species, the Galápagos penguin, is found north of the Equator.
Dinosaurs are a group of reptiles that have lived on Earth for about 245 million years.
Orangutans are great apes native to the rainforests of Indonesia and Malaysia. They are now found only in parts of Borneo and Sumatra, but during the Pleistocene they ranged throughout Southeast Asia and South China.
The giant panda, also known as the panda bear, is a bear species endemic to China. It is characterised by its bold black-and-white coat and rotund body.