The Molecular Biology Notebook Online
A Beginners' Guide to Molecular Biology

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Oxygen

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Colorless, tasteless,odorless gaseous element found in water, in numerous organic compounds, and that constitutes 21 per cent of the atmosphere. Oxygen can combine with all elements except the inert gases, and is active in most biological processes. It is especially involved in combustion.

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• Introduction to Hematology: Blood is the only tissue that flows throughout your body. This red liquid carries oxygen and nutrients to all parts of the body and waste products back to your lungs, kidneys and liver for disposal. It is also an essential part of your immune system, crucial to fluid and temperature balance, a hydraulic fluid for certain functions and a highway for hormonal messages.
• Lifeblood:: Blood is the fluid of life, transporting oxygen from the lungs to body tissue and carbon dioxide from body tissue to the lungs. Blood is the fluid of growth, transporting nourishment from digestion and hormones from glands throughout the body. Blood is the fluid of health, transporting disease fighting substances to the tissue and waste to the kidneys.
• Sickle Cell Anemia, from the Department of Radiology and Nuclear Medicine, Bethesda, Maryland: Sickle Cell Anemia (SCA) is caused by a change in the chemical composition of the hemoglobin protein that carries oxygen inside of the red blood cells (RBC's).
• The Human Circulatory System and the Heart: The human circulatory system brings oxygen and nutrients to every living tissue in your body. It also removes wastes disposed of by your lungs and kidneys. Find out more with this interactive learning module.
• Ultimate Guide to Photosynthesis - from StartLocal: Photosynthesis not only filters carbon dioxide from the earth’s atmosphere, but also produces the energy that makes life for animals possible. It replenishes oxygen in the atmosphere. It is a process necessary for all life.

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