Blood (all)

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What is blood type?

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Blood type refers to the classification of blood based on the presence or absence of specific antigens on the surface of red blood cells. The main blood types are A, B, AB, and O, with each type also being classified as positive (+) or negative (-) based on the presence of the Rh factor.

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What can blood spatter patterns indicate?

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Blood spatter patterns can indicate the direction of the blood's origin, the impact angle, and the type of force that caused the spatter. Analyzing these patterns helps in reconstructing the events of a crime scene.

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What does B- blood type mean?

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B- blood type means that the individual has B antigens on the surface of their red blood cells and lacks the Rh factor. This blood type can receive blood from B- and O- donors.

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What are lines of convergence in blood spatter analysis?

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Lines of convergence are imaginary lines drawn through the long axis of blood droplets that help determine the origin point of the blood spatter. They indicate the direction from which the blood traveled.

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What is a Transfer/Contact blood spatter pattern?

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A Transfer/Contact blood spatter pattern occurs when a bloodied object comes into contact with a surface, leaving a mark or impression of the blood. This pattern can provide information about the object that made the contact.

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What is the significance of the Rh factor in blood typing?

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The Rh factor is a protein that can be present (+) or absent (-) on the surface of red blood cells. It is significant for blood transfusions and pregnancy, as Rh incompatibility can lead to serious health issues.

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What is the difference between A+ and A- blood types?

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A+ blood type has A antigens and the Rh factor, while A- blood type has A antigens but lacks the Rh factor. This difference is crucial for safe blood transfusions.

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What is the role of platelets in blood?

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Platelets are small cell fragments in the blood that play a crucial role in blood clotting. They help prevent bleeding by clumping together at the site of a blood vessel injury.

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What is the function of red blood cells?

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Red blood cells (erythrocytes) are responsible for transporting oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs.

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What is the function of white blood cells?

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White blood cells (leukocytes) are part of the immune system and help the body fight infections and diseases by identifying and destroying pathogens.