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  2. en.wikipedia.org › wiki › Human_brainHuman brain - Wikipedia

    5 days ago · The brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system. The brain consists of the cerebrum , the brainstem and the cerebellum . It controls most of the activities of the body , processing, integrating, and coordinating the information it receives from the sense organs , and ...

  3. 4 days ago · Immune system, the complex group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing entities. Immunity from disease is conferred by two cooperative defense systems: innate immunity and acquired immunity. Learn more about the immune system’s mechanisms and evolution.

  4. 4 days ago · human nervous system, system that conducts stimuli from sensory receptors to the brain and spinal cord and conducts impulses back to other parts of the body.

  5. 3 days ago · brain, the mass of nerve tissue in the anterior end of an organism. The brain integrates sensory information and directs motor responses; in higher vertebrates it is also the centre of learning. The human brain weighs approximately 1.4 kg (3 pounds) and is made up of billions of cells called neurons. Junctions between neurons, known as synapses ...

    • The Editors of Encyclopaedia Britannica
  6. 3 days ago · The skeletal system in human is a major connective tissue system that is made up of organs, such as bones, ligaments, tendons and cartilages. The entire framework of body is made up of bones, which serves as a guarding system to protect the viscera and allows locomotion.

  7. 4 days ago · Organs of circulatory system include the heart, blood vessels, blood and lungs. Each of them plays an important role in supporting a healthy body.

  8. en.wikipedia.org › wiki › MetabolismMetabolism - Wikipedia

    4 days ago · Metabolism ( / məˈtæbəlɪzəm /, from Greek: μεταβολή metabolē, "change") is the set of life -sustaining chemical reactions in organisms.

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