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blood
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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)
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
pulmonary veins and arteries, circulation, cardiovascular system, human anatomy, (Netter replacement project - SSC)
13 Questions About How the Human Body Works Answered
Transfused Human blood in storage
The Strange, Grisly History of the First Blood Transfusion
Discover
Nazi Germany, Nazi SS troops marching with victory standards at the Party Day rally in Nuremberg, Germany, 1933. (Schutzstaffel, Nazi Party, Nurnberg)
Why Was Nazi Germany Called the Third Reich?
Illustration for Demystified "How Dangerous is Quicksand"
How Deadly Is Quicksand?
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”
Titanic infographic. The 30th anniversary of its discovery is September 1, 2015. SPOTLIGHT VERSION.
Timeline of the Titanic’s Final Hours
Candles Burning On Table In Church
What Is the Most Widely Practiced Religion in the World?
Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)
6 Important Mughal Emperors
Easter Procession of Maria Santisima del Sacromonte in Granada, Spain. This statue is known as Virgen de los Gitanos or The Virgin of the Gypsies.
What is Holy Week?

blood: Related Content

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News •

South Londoners roll up sleeves to give blood and save lives • Apr. 19, 2025, 6:54 AM ET (BBC)

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
Nuttall, George Henry Falkiner
George Henry Falkiner Nuttall
British biologist
Walter Bradford Cannon
American neurologist and physiologist
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
pulmonary veins and arteries, circulation, cardiovascular system, human anatomy, (Netter replacement project - SSC)
13 Questions About How the Human Body Works Answered
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)
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?