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The peripheral nervous system

The Peripheral Nervous System consists of nerves and nerve ganglia and its function is to connect the central nervous system to various parts of the human body. Nerves are bundles of nerve fibers surrounded by a layer of connective tissue. In the nerves there are blood vessels, responsible for the nutrition of nerve fibers.
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Origin of life

Life on Earth was probably about 3400 M.a., as the prokaryote fossils found in South Africa seem to show. Eukaryotic cells appeared about 2000 to 1400 M.a., followed by multicellular organisms about 700 M.a. In this time the fossils are abundant, indicating a rapid evolutionary process.
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Other stars of the Solar System

Satellites Until 1610, the only known satellite was Earth's - the Moon. At that time, Galileo Galilei (1564-1642), with his spyglass, discovered satellites orbiting the planet Jupiter. Today we know of dozens of satellites. In astronomy, a natural satellite is a celestial body that moves around a planet thanks to gravitational force.
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The breath

Breathing occurs day and night without stopping. We can survive for a while without food, but we can't breath without more than a few minutes. Do you know that all living beings need energy to live and that energy is obtained from food? Our body gets energy from food through the process of cellular respiration, performed in mitochondria, with the participation of oxygen gas obtained in the environment.
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Fruits and Seeds

Fruits arise from ovarian development, usually after egg fertilization. In general, the transformation of the ovary into fruit is induced by hormones released by developing embryos. There are cases, however, where fruit formation occurs without pollination. Fruit Parts A fruit is made up of two main parts: the pericarp, resulting from the development of the ovary walls, and the seeds, resulting from the development of fertilized eggs.
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