Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
blood
Table of Contents
References & Edit History Related Topics
Images & Videos
Blood plasma
Observe a red blood cell as it travels from the heart to the lungs and other body tissues
Function of red blood cells explained
How much blood is in the human body?
Why is blood red?
Blood components Red blood cell Myelocytes in bone marrow Hemoglobin tetramer
Learn about sickle cell anemia and blood behavior in sickle cell patients
For Students
blood summary
Quizzes
Superficial arteries and veins of face and scalp, cardiovascular system, human anatomy, (Netter replacement project - SSC)
The Human Body
Read Next
Diagram showing human heart
What’s the Difference Between Veins and Arteries?
Lateral view of an adult bedbug, Cimex lectularius, as it was in the process of ingesting a blood meal from the arm of a voluntary human host. Photo dated 2006.
8 Animals That Suck (Blood)
Transfused Human blood in storage
The Strange, Grisly History of the First Blood Transfusion
pulmonary veins and arteries, circulation, cardiovascular system, human anatomy, (Netter replacement project - SSC)
13 Questions About How the Human Body Works Answered
Hand washing. Healthcare worker washing hands in hospital sink under running water. contagious diseases wash hands, handwashing hygiene, virus, human health
17 Questions About Health and Wellness Answered
Discover
Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.
9 Memorials and Monuments in the United States
Portrait of a mountain gorilla at a short distance. gorilla close up portrait.The mountain gorilla (Gorilla beringei beringei)
Falling Stars: 10 of the Most Famous Endangered Species
Internet http://www blue screen. Hompepage blog 2009, history and society, media news television, crowd opinion protest, In the News 2009, breaking news
Who Invented the Internet?
Happy, smiling, flying pig
7 Everyday English Idioms and Where They Come From
Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.
7 Deadliest Weapons in History
Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere
Why Do Some Cicadas Appear Only Every 17 Years?
Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.
6 Animals We Ate Into Extinction

blood: Related Content

verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Share
Share to social media
URL
https://www.britannica.com/facts/blood-biochemistry
Written and fact-checked by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica

Photos and Videos

Blood plasma
Blood components
Red blood cell
Myelocytes in bone marrow
Hemoglobin tetramer
Macrophage structure
MRSA and neutrophil
Monocyte
Human lymphocyte
Human T cell
Observe a red blood cell as it travels from the heart to the lungs and other body tissues
Function of red blood cells explained
How much blood is in the human body?
Why is blood red?
Learn about sickle cell anemia and blood behavior in sickle cell patients
See All Videos and Images →

Related Topics and References

Topics

Key People

Stephen Hales
Stephen Hales
English scientist
Edwin Joseph Cohn
American biochemist
William Harvey
William Harvey
English physician
Claude Bernard, detail of a lithograph by A. Laemlein, 1858
Claude Bernard
French scientist
Marcello Malpighi
Marcello Malpighi
Italian scientist
Bernardo Alberto Houssay
Argentine physiologist
Charles Richard Drew
Charles Richard Drew
American physician
Walter Bradford Cannon
American neurologist and physiologist
Nuttall, George Henry Falkiner
George Henry Falkiner Nuttall
British biologist
Ernst Felix Hoppe-Seyler
German physician

Related Quizzes and Features

Quiz
Superficial arteries and veins of face and scalp, cardiovascular system, human anatomy, (Netter replacement project - SSC)
The Human Body
Superficial arteries and veins of face and scalp, cardiovascular system, human anatomy, (Netter replacement project - SSC)
The Human Body
List
Lateral view of an adult bedbug, Cimex lectularius, as it was in the process of ingesting a blood meal from the arm of a voluntary human host. Photo dated 2006.
8 Animals That Suck (Blood)
pulmonary veins and arteries, circulation, cardiovascular system, human anatomy, (Netter replacement project - SSC)
13 Questions About How the Human Body Works Answered
Hand washing. Healthcare worker washing hands in hospital sink under running water. contagious diseases wash hands, handwashing hygiene, virus, human health
17 Questions About Health and Wellness Answered
Demystified
Diagram showing human heart
What’s the Difference Between Veins and Arteries?