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  2. Infrared sensing in snakes - Wikipedia

    en.wikipedia.org/wiki/Infrared_sensing_in_snakes

    The ability to sense infrared thermal radiation evolved independently in two different groups of snakes, one consisting of the families Boidae (boas) and Pythonidae (pythons), the other of the family Crotalinae (pit vipers). What is commonly called a pit organ allows these animals to essentially "see" [1] radiant heat at wavelengths between 5 ...

  3. Human head - Wikipedia

    en.wikipedia.org/wiki/Human_head

    The head contains sensory organs: two eyes, two ears, a nose and tongue inside of the mouth. It also houses the brain. Together, these organs function as a processing center for the body by relaying sensory information to the brain. Humans can process information faster by having this central nerve cluster. Society and culture

  4. Organ system - Wikipedia

    en.wikipedia.org/wiki/Organ_system

    There are 11 distinct organ systems in human beings, [2] which form the basis of human anatomy and physiology. The 11 organ systems: the respiratory system, digestive and excretory system, circulatory system, urinary system, integumentary system, skeletal system, muscular system, endocrine system, lymphatic system, nervous system, and ...

  5. Shark anatomy - Wikipedia

    en.wikipedia.org/wiki/Shark_anatomy

    Internal organs. The liver is a large and oily organ that comprises 25% of the total body weight of the shark. The two purposes of this organ in the shark are to store energy and oil. The liver is a hydrostatic organ. This organ helps with buoyancy since the liver stores oils, decreasing the density of the shark's body.

  6. Vocal resonation - Wikipedia

    en.wikipedia.org/wiki/Vocal_resonation

    Vocal resonation. Vocal resonance may be defined as "the process by which the basic product of phonation is enhanced in timbre and/or intensity by the air-filled cavities through which it passes on its way to the outside air." [1] Throughout the vocal literature, various terms related to resonation are used, including: amplification, filtering ...

  7. List of nerves of the human body - Wikipedia

    en.wikipedia.org/wiki/List_of_nerves_of_the...

    The cerebrospinal fluid. The cranial nerves. The olfactory nerves. The optic nerve. The oculomotor nerve. The trochlear nerve. The trigeminal nerve. The abducens nerve. The facial nerve.

  8. Immune system - Wikipedia

    en.wikipedia.org/wiki/Immune_system

    Immune system. The immune system is a network of biological systems that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to parasitic worms, as well as cancer cells and objects such as wood splinters, distinguishing them from the organism's own healthy tissue.

  9. Spermaceti organ - Wikipedia

    en.wikipedia.org/wiki/Spermaceti_organ

    Spermaceti organ within a sperm whale. The spermaceti organ is an organ present in the heads of toothed whales of the family Physeteroidea, in particular the sperm whale. This organ contains a waxy liquid called spermaceti and is involved in the generation of sound. [1]