Blood Function
Blood Function - Related Videos
11:31
Antigens Protected Functional Red Blood Cells By The Membrane Grafting Of Compact Hyperbranched Polyglycerols
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Cited by 5 •
2013
The cell membrane modification of red blood cells (RBCs) with hyperbranched polyglycerol (HPG) is presented. Modified RBCs were characterized by aqueous two phase partitioning, osmotic fragility and complement mediated lysis. The camouflage of surface proteins and antigens was evaluated using the flow cytometry and Micro Typing System (MTS) blood phenotyping cards.
01:26
Characteristics and Functions of Blood
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2024
Blood is specialized connective tissue comprising about 8% of the body mass. It has a thick, liquid extracellular matrix that contains cells, dissolved proteins, and electrolytes, making it five times more viscous than water. Blood is warm, around 38°C, and has an alkaline pH ranging from 7.35 to 7.45. The primary function of blood is to transport oxygen and carbon dioxide between tissues and the lungs. Oxygenated blood is bright red, while oxygen-depleted blood is darker. It also carries...
03:47
Functional Imaging of Cerebral Blood Flow Using Transcranial Doppler Ultrasound
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2025
Source: Hage, B. D. et. al., Functional Transcranial Doppler Ultrasound for Monitoring Cerebral Blood Flow. J. Vis. Exp. (2021) This video demonstrates the use of Doppler ultrasound as a functional imaging tool to measure cerebral blood flow velocity, or CBFV in real time. It highlights how frequency shifts in the middle cerebral artery during tasks like breath-holding reveal changes in CBFV, offering insights into brain activity and vascular dynamics.
10:44
Expansion, Purification, and Functional Assessment of Human Peripheral Blood NK Cells
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Cited by 153 •
2011
Here we describe a method to efficiently expand and purify large numbers of human NK cells and assess their function.
03:46
Blood Oxygen Level-Dependent Functional Magnetic Resonance Imaging of the Visual Cortex
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2025
Source: Galenchik-Chan, A., et al. Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation. J. Vis. Exp. (2023). The video demonstrates functional magnetic resonance imaging (fMRI) of the visual cortex to map activity based on blood oxygenation levels. Structural MRI images are acquired as anatomical references, followed by fMRI scans. Visual stimuli are displayed to activate retinotopic neurons in the visual cortex. The increased energy demand...
FAQs
Hemoglobin enables red blood cells to bind oxygen in the lungs and release it at body tissues. This reversible binding links respiratory gas exchange with cellular oxygen supply, making red blood cell performance central to circulation. Studying this mechanism helps explain disorders in which tissues receive insufficient oxygen even when blood continues to circulate.
Plasma provides the fluid medium that carries nutrients, hormones, gases, and wastes through the circulation. By distributing these materials, it connects distant organs and supports coordinated regulation of body conditions. Its transport role also contributes to fluid balance, while the substances it carries participate in maintaining temperature and pH across the body.
White blood cells protect the body by recognizing and responding to pathogens, whereas platelets respond to vessel damage by initiating clot formation. These mechanisms address different threats: immune protection limits biological invasion, while coagulation limits blood loss. Their distinct activities show how blood combines defense and repair within a single connective tissue.
Diagnostic testing can examine blood-related problems by focusing on oxygen delivery, infection, or coagulation. These areas correspond to the activities of red blood cells, white blood cells, and platelets, respectively. Such evaluation helps connect observed blood changes with disease mechanisms and supports decisions about treatments for disorders involving circulation, immune protection, or blood loss.
Changes in blood function can affect several interconnected processes at once, including oxygen supply, pathogen defense, and control of bleeding. Because blood also contributes to pH, temperature, and fluid regulation, disruption in one role may influence overall homeostasis. Biology and medical research therefore use blood function to interpret how disease alters coordinated body systems.
Blood links the circulatory system to tissues that require nutrients, hormones, gases, and waste removal. Its coordinated activities also connect circulation with immunity, injury response, and homeostasis. This makes blood function relevant to biology at multiple levels, from the behavior of hemoglobin and platelets to the maintenance of stable conditions throughout the body.