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Macrophages (/ˈmækroʊfeɪdʒ/; abbreviated Mφ, MΦ or MP) are a type of white blood cell of the innate immune system that engulf and digest pathogens, such...

A calendar date is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The...

The Audi A6 is an executive car made by the German company Audi since 1994. Now in its fifth generation, the successor to the Audi 100 is manufactured...

Lymph (from Latin lympha 'water') is the fluid that flows through the lymphatic system, a system composed of lymph vessels (channels) and intervening lymph...

The mata mata, mata-mata, or matamata (Chelus fimbriata) is a South American species of freshwater turtle found in the Amazon basin and river system of...

In physics, attenuation (in some contexts, extinction) is the gradual loss of flux intensity through a medium. For instance, dark glasses attenuate sunlight...

Trace amine-associated receptors (TAARs), sometimes referred to as trace amine receptors (TAs or TARs), are a class of G protein-coupled receptors that...

Human intelligence is the intellectual capability of humans, which is marked by complex cognitive feats and high levels of motivation and self-awareness...

A unit of selection is a biological entity within the hierarchy of biological organization (for example, an entity such as: a self-replicating molecule...

Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well...

In neuroscience and anatomy, nodes of Ranvier (/ˈrɑːnvieɪ/ RAHN-vee-ay), also known as myelin-sheath gaps, occur along a myelinated axon where the axolemma...

Eodicynodon (eo-, early or primitive, dicynodont) is an extinct genus of dicynodont therapsids, a highly diverse group of herbivorous synapsids that were...

A megakaryocyte (mega- + karyo- + -cyte, "large-nucleus cell") is a large bone marrow cell with a lobated nucleus that produces blood platelets (thrombocytes)...

Loose connective tissue, also known as areolar tissue, is a cellular connective tissue with thin and relatively sparse collagen fibers. They have a semi-fluid...

Chorda tympani is a branch of the facial nerve that carries gustatory (taste) sensory innervation from the front of the tongue and parasympathetic (secretomotor)...

Pancreatoblastoma is a rare type of pancreatic cancer. It occurs mainly in childhood and has a relatively good prognosis. Children with pancreatoblastoma...

The Large Helical Device (大型ヘリカル装置, Ōgata Herikaru Sōchi) (LHD) is a fusion research device located in Toki, Gifu, Japan. It is operated by the National...

Haplogroup K2a (M2308, Z4842) is a human Y-chromosome DNA haplogroup. K2a is a primary subclade of haplogroup K2 (M526), which in turn is a primary descendant...

Posterior cerebral artery syndrome is a condition whereby the blood supply from the posterior cerebral artery (PCA) is restricted, leading to a reduction...

A vaccine-preventable disease is an infectious disease for which an effective preventive vaccine exists. If a person acquires a vaccine-preventable disease...