Blood

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InnovateUs states that the main function of hemoglobin is transporting oxygen from the lungs to other parts of the body. It is an important chemical in red blood cells that carries oxygen, and performs different effect modulation and gas transport duties.

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  • What is the function of hemoglobin?

    Q: What is the function of hemoglobin?

    A: InnovateUs states that the main function of hemoglobin is transporting oxygen from the lungs to other parts of the body. It is an important chemical in red blood cells that carries oxygen, and performs different effect modulation and gas transport duties.
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  • What color is blood inside the body?

    Q: What color is blood inside the body?

    A: Human blood is red inside the body because of the numerous red blood cells, which contain hemoglobin. However, the blood color ranges from bright red to dark red.
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  • What is deoxygenated blood?

    Q: What is deoxygenated blood?

    A: According to For Dummies, deoxygenated blood is blood that has no oxygen. Blood becomes deoxygenated after receiving carbon dioxide in exchange for carbon dioxide, which occurs at the cell membrane during respiration and circulation.
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  • Why do girls blush?

    Q: Why do girls blush?

    A: According to HowStuffWorks, blushing is an automatic response to embarrassment and self-consciousness. Embarrassment causes a release of adrenaline hormones that cause blood vessels to dilate. These dilated blood vessels affect the veins in the face, and the increased blood flow causes a reddened appearance.
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  • What does the pulmonary vein do?

    Q: What does the pulmonary vein do?

    A: The pulmonary veins carry oxygen-rich blood from the lungs to the heart. There are four such veins, according to About.com, and they all connect to the heart at the left atrium.
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  • Could a man with an AB blood type be the father of a child with type O blood?

    Q: Could a man with an AB blood type be the father of a child with type O blood?

    A: A man with type AB blood cannot be the father of a child with type O blood. A child with type O blood would have to get the O allele from both its father and mother.
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  • Why does rigor mortis occur?

    Q: Why does rigor mortis occur?

    A: Rigor mortis occurs because, after death, the muscles of the body partially contract, but they are unable to return to their relaxed state. About.com further explains that this causes the muscles to become fixed in place for around 72 hours.
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  • What is the difference between warm-blooded and cold-blooded animals?

    Q: What is the difference between warm-blooded and cold-blooded animals?

    A: The difference between warm-blooded and cold-blooded animals involves the body temperature of the animal. Birds and mammals have warm blood and attempt to keep their internal parts at a set temperature. In a colder environment, their bodies create heat, and when they are in a warmer environment, their bodies cool themselves. Cold-blooded animals have the same temperature as their environment.
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  • What is the function of glucose in the human body?

    Q: What is the function of glucose in the human body?

    A: Glucose provides a source of energy for the human body. Experts from Georgia State University say glucose is the most important simple sugar used for human metabolism.
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  • Why is blood classified as a tissue?

    Q: Why is blood classified as a tissue?

    A: According to School of Medicine at Southern Illinois University Carbondale, blood is classified as a type of connective tissue because it has the same mesodermal origin as other connective tissues. As About.com describes, all connective tissues, including blood, consist of cells dispersed in the extracellular matrix.
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  • How fast does the body replace blood?

    Q: How fast does the body replace blood?

    A: Different components of human blood are replaced at different rates. According to the AABB, a non-profit organization that represents organizations that conduct blood transfusions, plasma is replaced within a few hours of a blood donation while the red blood cells take a few weeks to replace. Doctors usually only remove about one pint of blood during a transfusion, which represents about 10 percent of the total blood volume.
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  • What happens when blood is too thick?

    Q: What happens when blood is too thick?

    A: When blood is too thick, it clots more easily, and the potential exists for blockage of the blood flow through the arteries and veins, according to the National Heart, Lung and Blood Institute. This may trigger a heart attack or stroke. Polycythemia vera is a condition in which the body produces too many red blood cells, causing thickening of the blood and increasing the possibility that clotting occurs.
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  • Which type of blood cells carry waste away from cells?

    Q: Which type of blood cells carry waste away from cells?

    A: Red blood cells carry waste from the cells to the lungs. Once this happens, the lungs remove the waste from the body by exhalation.
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  • What are the smallest arteries called?

    Q: What are the smallest arteries called?

    A: The smallest arteries in the body are called arterioles. Arterioles are blood vessels that help to regulate the volume of oxygenated blood available in the capillaries that supply it to tissues and cells.
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  • How much is one unit of blood?

    Q: How much is one unit of blood?

    A: A unit of blood is equivalent to approximately 1 pint or 450 milliliters, according to the Canadian Blood Services website. The average patient requires around 4.6 units of blood.
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  • What is the structure of arteries?

    Q: What is the structure of arteries?

    A: Arteries have three main layers or tunics known as the adventitia (outer), media (middle) and intima (inner). The outer layer is made of connective tissue with collagen fibers, the middle layer consists of smooth muscle and elastic fibers, and the innermost layer is composed of specialized squamous cells supported by the basement membrane of connective tissue.
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  • How does oxygenated blood become deoxygenated?

    Q: How does oxygenated blood become deoxygenated?

    A: Red blood cells contain a protein called hemoglobin that takes up and releases oxygen in response to the environment around it. Hemoglobin is what's called a "metalloprotein" because it incorporates atoms of iron into its structure. This iron is positively charged and readily binds with oxygen. In oxygen-poor environments, the hemoglobin releases the oxygen it carries and picks up carbon dioxide.
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  • What causes blood vessels to break?

    Q: What causes blood vessels to break?

    A: The breaking of blood vessels can be caused by trauma, various medical conditions or disease, states Reference.com. The most common cause of blood vessels breaking and bruising (discoloration due to bleeding into the skin) is trauma to the body.
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  • What is the difference between arterial and venous blood?

    Q: What is the difference between arterial and venous blood?

    A: In the strictest sense, blood that is being carried toward the heart is venous, while blood being carried away from the heart is arterial, according to Dictionary.com. However, with the exception of the blood carried by the pulmonary arteries and veins, blood in the arteries also carries more oxygen than blood in the veins.
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  • How many liters of blood are in the human body?

    Q: How many liters of blood are in the human body?

    A: The average adult human carries roughly five liters of blood. This number fluctuates depending on height, weight and muscle mass.
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  • What happens when blood reaches the lungs?

    Q: What happens when blood reaches the lungs?

    A: Blood that reaches the lungs travels throughout a network of small blood vessels, where oxygen moves into the blood and carbon dioxide moves out of the blood, according to the National Heart, Lung and Blood Institute. This oxygen-rich blood is transported through the pulmonary veins and back to the heart, where it is pumped out to the rest of the body.
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