Aging

Ageing or aging (see spelling differences) is the process of becoming older. The term refers especially to human beings, many animals, and fungi, whereas for example bacteria, perennial plants and some simple animals are potentially biologically immortal. In the broader sense, aging can refer to single cells within an organism which have ceased dividing (cellular senescence) or to the population of a [...]

Cells

The cell (from Latin cella, meaning "small room"[1]) is the basic structural, functional, and biological unit of all known organisms. A cell is the smallest unit of life. Cells are often called the "building blocks of life". The study of cells is called cell biology, cellular biology, or cytology. Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids.[2] Most plant [...]

COVID-19 pandemic

From Wikipedia, the free encyclopedia. COVID‑19 pandemicConfirmed cases per 100,000 population as of 8 August 2020  >3,000  1,000–3,000  300–1,000  100–300  30–100  0–30  None or no dataCases per countryDeaths per capitaClockwise, starting from top:A nurse caring for a COVID‑19 patient in an intensive care unit aboard a U.S. hospital shipDisinfection vehicles in TaiwanDonated medical supplies being received in the PhilippinesBurial in IranThe Italian government's outbreak task [...]

Earth

From Wikipedia, the free encyclopedia. This article is about the planet. For its human aspects, see the World. For other uses, see Earth (disambiguation) and Planet Earth (disambiguation). Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating estimation and other evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and [...]

Economics

Economics (/ɛkəˈnɒmɪks, iːkə-/)[1][2][3] is the social science that studies the production, distribution, and consumption of goods and services.[4] Economics focuses on the behaviour and interactions of economic agents and how economies work. Microeconomics analyzes basic elements in the economy, including individual agents and markets, their interactions, and the outcomes of interactions. Individual agents may include, for example, households, firms, buyers, and sellers. Macroeconomics analyzes the economy as a system where production, consumption, saving, and [...]

Geology

Geology (from the Ancient Greek γῆ, gē ("earth") and -λoγία, -logia, ("study of", "discourse")[1][2]) is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time. Geology can also include the study of the solid features of any terrestrial planet or natural satellite such as Mars or the Moon. Modern geology significantly overlaps all other earth sciences, including hydrology and the atmospheric sciences, and [...]

Humans

Humans (Homo sapiens) are highly intelligent primates that have become the dominant species on Earth. They are the only extant members of the subtribe Hominina and together with chimpanzees, gorillas, and orangutans, they are part of the family Hominidae (the great apes, or hominids). Humans are terrestrial animals, characterized by their erect posture and bipedal locomotion; high manual dexterity and heavy tool use compared to other animals; open-ended and complex language use compared to other animal communications; larger, more complex brains [...]

Kidney

The kidneys are two bean-shaped organs found in vertebrates. They are located on the left and right in the retroperitoneal space, and in adult humans are about 12 centimetres (4 1⁄2 inches) in length.[1][2] They receive blood from the paired renal arteries; blood exits into the paired renal veins. Each kidney is attached to a ureter, a tube that carries excreted urine to the bladder. The nephron is the structural and functional [...]