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blood vessel
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Diagram of the circulatory system showing a red artery carrying blood from the heart, branching into smaller arterioles and capillaries, then merging into blue venules and a vein returning blood to the heart. Zebra fish brain vasculature
Gloved hands hold a blood sample tube above a rack of vials in a laboratory, illustrating blood analysis in human body science.
Lung capillary Examples of extracellular fluids include lymph and plasma.
Understanding the human cardiovascular system
How do bruises form?
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Male muscle, man flexing arm, bicep curl.
Facts You Should Know: The Human Body Quiz
Superficial arteries and veins of face and scalp, cardiovascular system, human anatomy, (Netter replacement project - SSC)
The Human Body
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How Much Blood is in the Human Body?
And how much do you really need?
Video: Encyclopædia Britannica, Inc.
Understanding the human cardiovascular system
The vascular system is a network of arteries, veins, and capillaries that supplies...
Video: Encyclopædia Britannica, Inc.
How do bruises form?
Learn about bruises, including their treatment.
Video: Contunico © ZDF Studios GmbH, Mainz

Images

Basic concepts of circulation
Blood flows from the heart through arteries and into capillaries. It then returns...
Encyclopædia Britannica, Inc.
Zebra fish brain vasculature
Confocal microscope image of the brain vasculature of a live zebra fish larva. The...
© Michael R. Taylor/School of Pharmacy, University of Wisconsin-Madison
Lung capillary
A colored scanning electron micrograph of blood vessels in the lung.
Science Photo Library/Punchstock
Examples of extracellular fluids include lymph and plasma.
Encyclopædia Britannica, Inc.
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