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Related Concept Videos

Composition of Blood01:22

Composition of Blood

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The blood in our bodies comprises three major components: blood plasma, formed elements, and the extracellular matrix. Blood plasma is a yellowish fluid that constitutes 55% of the total blood volume. It is primarily made up of water and essential substances such as electrolytes and proteins. Blood plasma serves as a medium for transporting blood cells and also contains nutrients, enzymes, hormones, antibodies, and gases.
Formed elements constitute the remaining 45% of the blood volume. These...
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Blood Flow01:29

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Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
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Blood Types02:20

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Human blood is classified into different types based on the presence of antigens on the red blood cell's surface and antibodies in the plasma. Proper identification of blood type is essential for successful blood transfusion. The International Society of Blood Transfusion has identified 38 human blood types based on the surface antigens on the red blood cells. The most common types are ABO, Rh, and MNS blood types.
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Blood Pressure01:24

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The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
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Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
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The ABO blood group system is a critical element of transfusion medicine, essential for determining blood compatibility in transfusions and organ transplants. It is based on specific antigens, or agglutinogens, present on the surface of red blood cells (RBCs) and corresponding antibodies, or agglutinins, in the blood plasma.
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Related Experiment Video

Updated: Feb 1, 2026

Phenotypic Analysis of Rodent Malaria Parasite Asexual and Sexual Blood Stages and Mosquito Stages
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Phenotypic Analysis of Rodent Malaria Parasite Asexual and Sexual Blood Stages and Mosquito Stages

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Malariablood in the pocket.

Stefan Wulf

    Medizinhistorisches Journal
    |December 15, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Two paralytics received artificial malaria infections in 1919, undergoing the Wagner-Jauregg malaria fever treatment. Discrepancies between medical files and published histories highlight a unique remission concept based on patients' ability to work.

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    Area of Science:

    • Medical History
    • Infectious Disease Therapy
    • Psychiatry

    Background:

    • The Wagner-Jauregg malaria fever therapy, introduced in 1917, aimed to treat neurosyphilis.
    • This study focuses on the initial implementation of this novel treatment in Hamburg.

    Observation:

    • Two patients, an opera singer and a yardmaster, were artificially infected with malaria on June 5, 1919.
    • Their medical files and contemporary publications reveal significant discrepancies in case histories.

    Findings:

    • A unique definition of remission was applied, primarily assessing patients' restored ability to work.
    • The comparison between medical records and published accounts shows notable differences in patient outcomes and treatment descriptions.

    Implications:

    • The findings question the standardized reporting of therapeutic outcomes in early 20th-century medicine.
    • Understanding these discrepancies provides insight into the historical application and interpretation of fever therapies for psychiatric conditions.