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blood

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Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells of the body, and transports metabolic waste products away from those same cells.

AI overview

Blood is a fluid that circulates through your body and delivers essential nutrients and oxygen to your cells while carrying away waste products they produce. It's vital because without this constant transport system, your cells couldn't survive or function properly.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Anatomy.Name
Blood
Anatomy.Latin
sanguis
Anatomy.Greek
αἷμα (haîma)
Anatomy.Image
Venous and arterial blood.jpg
Anatomy.Caption
Venous (darker) and arterial (brighter) blood in syringes.

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Research

6,032,762 papers

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Wikidata facts

Image
Blood Test (15575812743).jpg
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Commons category
Blood
Commons gallery
Blood
NCI Thesaurus ID
C12434
Unicode character
🩸
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~35 min read

Article

46 sections
Contents
  • Functions
  • Constituents
  • In mammals
  • Cells
  • Plasma
  • Acidity
  • In non-mammals
  • Physiology
  • Circulatory system
  • Cell production and degradation
  • {{anchor|Oxygen transport}}Oxygen transport
  • Carbon dioxide transport
  • Transport of hydrogen ions
  • Lymphatic system
  • Thermoregulation
  • Rate of flow
  • Hydraulic functions
  • Color
  • Disorders
  • General medical
  • Hematological
  • Carbon monoxide poisoning
  • Treatments
  • Transfusion
  • Intravenous administration
  • Letting
  • Etymology
  • History
  • Classical Greek medicine
  • Types
  • Culture and religion
  • Indigenous Australians
  • European paganism
  • Christianity
  • Judaism
  • Islam
  • Jehovah's Witnesses
  • Vampirism
  • Invertebrates
  • Other uses
  • Forensic and archaeological
  • Artistic
  • Genealogical
  • See also
  • References
  • External links

Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells of the body, and transports metabolic waste products away from those same cells.

Blood is composed of blood cells suspended in plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), and contains proteins, glucose, mineral ions, and hormones. The blood cells are mainly red blood cells (erythrocytes), white blood cells (leukocytes), and (in mammals) platelets (thrombocytes). The most abundant cells are red blood cells. These contain hemoglobin, which facilitates oxygen transport by reversibly binding to it, increasing its solubility. Jawed vertebrates have an adaptive immune system, based largely on white blood cells. White blood cells help to resist infections and parasites. Platelets are important in the clotting of blood.

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