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Respiratory droplets are produced naturally as a result of breathing, speaking, sneezing, coughing, or vomiting, so they are always present in our breath, but speaking and coughing increase their number. [1] [2] [3] Droplet sizes range from < 1 μm to 1000 μm, [1] [2] and in typical breath there are around 100 droplets per litre of breath.
The animal propels itself by moving the flukes up and down. The pectoral flippers (at the sides of the body) are for steering; they contain bones homologous to the forelimbs of land mammals. A bottlenose dolphin discovered in Japan has two additional pectoral fins, or "hind legs", at the tail, about the size of a human's pair of hands.
D. folliculorum prefers areas where sebum production is high, [7] and is typically found in hair follicles on the human face, [12] generally in greater numbers around the cheeks, nose, and forehead, but also elsewhere on the face, eyelids, and ears. [9]
The bonobo is commonly considered to be more gracile than the common chimpanzee. Although large male chimpanzees can exceed any bonobo in bulk and weight, the two species broadly overlap in body size. Adult female bonobos are somewhat smaller than adult males.
The human genome is a complete set of nucleic acid sequences for humans, encoded as DNA within the 23 chromosome pairs in cell nuclei and in a small DNA molecule found within individual mitochondria. These are usually treated separately as the nuclear genome and the mitochondrial genome. [1] Human genomes include both protein-coding DNA sequences and various types of DNA that does not encode ...
The Bluntnose sixgill shark is one of four shark species that have six gill pairs. Other three are - Frilled shark ( Chlamydoselachus anguineus ), Bigeyed sixgill shark ( Hexanchus nakamurai) [4]) and Atlantic sixgill shark ( Hexanchus vitulus) The bluntnose sixgill shark has a large body and long tail. The snout is blunt and wide, and its eyes ...
The Tsar Bomba (Russian: Царь-бомба, romanized: Tsar'-bomba, IPA: [t͡sarʲ ˈbombə], lit. ' Tsar bomb'; code name: Ivan [5] or Vanya ), also known by the alphanumerical designation " AN602 ", was a thermonuclear aerial bomb, and the most powerful nuclear weapon ever created and tested. [6] [7] The Soviet physicist Andrei Sakharov ...
The tiger ( Panthera tigris) is the largest living cat species and a member of the genus Panthera native to Asia. It has a powerful, muscular body with a large head and paws, a long tail, and orange fur with black, mostly vertical stripes. It is traditionally classified into nine recent subspecies, though some recognise only two subspecies, mainland Asian tigers and island tigers of the Sunda ...