are eyes classed as organs?
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Organs are the body's recognizable structures (for example, the heart, lungs, liver, eyes, and stomach) that perform specific functions. An organ is made of several types of tissue and therefore several types of cells.
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Organ systems Two or more organs working together in the execution of a specific body function form an organ system, also called a biological system or body system. The functions of organ systems often share significant overlap.
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Despite its peripheral location, the retina or neural portion of the eye, is actually part of the central nervous system.
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Vital organs These are the brain, heart, kidneys, liver and lungs. The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones.
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Tissues are collections of cells which serve the same function while organs are collections of tissues. Organ systems are composed of groups of organs with the same purpose and function. The types of tissues include epithelial, connective, nervous and muscle.
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Not available. Not classified. Causes serious eye damage. May cause damage to organs (blood, bone marrow, lymphatic system, spleen) through prolonged or repeated exposure.
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Solid Organs are the liver, spleen, lungs, kidneys, and the heart. Being solid, they do not contract as actively as the hollow organs.
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Both humans and the frog have the same kinds of organs and systems of organs. The frog's anatomy, however, is much simpler. 1) General Body Features As in other higher vertebrates, the frog body may be divided into a head, a short neck, and a trunk. The flat head contains the brain, mouth, eyes, ears, and nose.
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Organs are structures composed of two or more tissues; organ systems are systems composed of two or more organs.
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Eyes. Eyes are probably the most important symbolic sensory organ. They can represent clairvoyance, omniscience, and/or a gateway into the soul. Other qualities that eyes are commonly associated with are: intelligence, light, vigilance, moral conscience, and truth.
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Fish eyes contain many of the same components as human eyes, but they are structured and used differently. Fish have a cornea or outer covering, a lens for “taking a picture,” an iris for adjusting light, a retina containing light-sensitive cells and an optic nerve for translating the picture to the brain.
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Six extraocular muscles attach directly to the eyes to assist with movement. The front visible part of the eye is made up of the whitish sclera, a coloured iris, and the pupil. A thin layer called the conjunctiva sits on top of this. The front part is also called the anterior segment of the eye.
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['The sclera, or white part of the eye, protects the eyeball.', 'The pupil, or black dot at the centre of the eye, is an opening through which light can enter the eye.', 'The iris, or coloured part of the eye, surrounds the pupil.']
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Some organs are in more than one system. For example, the nose is in both the respiratory system and also is a sensory organ in the nervous system. The testes and ovary are both part of the reproductive systems and endocrine systems.
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['Parts of the Eye. Here I will briefly describe various parts of the eye:', 'Sclera. The sclera is the white of the eye. ... ', 'The Cornea. The cornea is the clear bulging surface in front of the eye. ... ', 'Anterior & Posterior Chambers. The anterior chamber is between the cornea and the iris. ... ', 'Iris/Pupil. ... ', 'Lens. ... ', 'Vitreous Humor. ... ', 'Retina.']
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['The Cornea. The cornea is a transparent dome-shaped tissue that forms the front part of your eye. ... ', 'Aqueous Humor. ... ', 'The Sclera. ... ', 'The Iris and the Pupil. ... ', 'The Lens. ... ', 'The Choroid. ... ', 'The Vitreous.']
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Much of this information comes through the sensory organs: the eyes, ears, nose, tongue, and skin. Specialized cells and tissues within these organs receive raw stimuli and translate them into signals the nervous system can use.