blood - meaning and definition. What is blood
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What (who) is blood - definition

ORGANIC FLUID WHICH TRANSPORTS NUTRIENTS THROUGHOUT THE ORGANISM
Peripheral blood cell; Peripheral blood cells; Human blood; Blood organ; Peripheral blood; Blood-forming; Hemic; Oxygenated blood; BLOOD; Blood composition; Bloodiness; Oxygen transport; Blood oxygen capacity; Oxygen capacity; Blood oxygen-carrying capacity; Transporting oxygen; Oxygen consumption; Oxygen delivery; Oxygen-carrying capacity; Blood physiology; Haemochrome; Hemochrome; The hematologic system; Deoxygenated blood; Human Blood; Blood color; 🩸
  • Hemoglobin, a globular protein<br />green = haem (or heme) groups<br />red & blue = protein subunits
  • Capillary blood from a bleeding finger
  • Venous blood collected during blood donation
  • Circulation of blood through the human heart
  • Vertebrate red blood cell types, measurements in micrometers
  • left

blood         
Frequency: The word is one of the 1500 most common words in English.
1.
Blood is the red liquid that flows inside your body, which you can see if you cut yourself.
N-UNCOUNT
2.
You can use blood to refer to the race or social class of someone's parents or ancestors.
There was Greek blood in his veins...
N-UNCOUNT: usu supp N
3.
If you say that there is bad blood between people, you mean that they have argued about something and dislike each other.
There is, it seems, some bad blood between Mills and the Baldwins.
PHRASE: oft PHR between pl-n
4.
If you say that something makes your blood boil, you are emphasizing that it makes you very angry.
It makes my blood boil to think two thugs decided to pick on an innocent young girl.
PHRASE: V inflects [emphasis]
5.
If something violent and cruel is done in cold blood, it is done deliberately and in an unemotional way.
The crime had been committed in cold blood.
PHRASE: PHR after v [disapproval]
see also cold-blooded
6.
If you say that something makes your blood run cold or makes your blood freeze, you mean that it makes you feel very frightened.
The rage in his eyes made her blood run cold...
He could hear a sudden roaring. His blood froze.
PHRASE: V inflects [emphasis]
7.
If you say that someone has a person's blood on their hands, you mean that they are responsible for that person's death.
He has my son's blood on his hands. I hope it haunts him for the rest of his days.
PHRASE
8.
If a quality or talent is in your blood, it is part of your nature, and other members of your family have it too.
Diplomacy was in his blood: his ancestors had been feudal lords...
He has adventure in his blood.
PHRASE: oft v-link PHR
9.
You can use the expressions new blood, fresh blood, or young blood to refer to people who are brought into an organization to improve it by thinking of new ideas or new ways of doing things.
There's been a major reshuffle of the cabinet to bring in new blood...
PHRASE
10.
If you say that someone sweats blood trying to do something, you are emphasizing that they try very hard to do it.
I had to sweat blood for an M.A.
PHRASE: V inflects [emphasis]
11.
flesh and blood: see flesh
own flesh and blood: see flesh
blood         
¦ noun
1. the red liquid that circulates in the arteries and veins, carrying oxygen to and carbon dioxide from the tissues of the body.
2. violence involving bloodshed.
3. fiery or passionate temperament.
4. family background; descent or lineage: she must have Irish blood.
5. dated a fashionable and dashing young man.
¦ verb
1. initiate (someone) in a particular activity.
2. Hunting smear the face of (a novice hunter) with the blood of the kill.
give (a hound) a first taste of blood.
Phrases
blood and thunder informal unrestrained and violent action or behaviour.
one's blood is up one is in a fighting mood.
blood, sweat, and tears extremely hard work.
first blood
1. the first shedding of blood in a fight or (formerly) a duel.
2. the first point or advantage gained in a contest.
give blood allow blood to be removed medically from one's body in order to be stored for use in transfusions.
have blood on one's hands be responsible for someone's death.
in one's blood ingrained in or fundamental to one's character.
make someone's blood boil informal infuriate someone.
make someone's blood run cold horrify someone.
new (or fresh) blood new members admitted to a group.
of the blood (royal) literary royal.
young blood a younger member or members of a group.
Origin
OE blod, of Gmc origin.
Blood         
[bl?d]
¦ noun (plural same or Bloods) a member of a North American Indian people belonging to the Blackfoot Confederacy.

Wikipedia

Blood

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, and transports metabolic waste products away from those same cells. Blood in the circulatory system is also known as peripheral blood, and the blood cells it carries, peripheral blood cells.

Blood is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), and contains proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and blood cells themselves. Albumin is the main protein in plasma, and it functions to regulate the colloidal osmotic pressure of blood. The blood cells are mainly red blood cells (also called RBCs or erythrocytes), white blood cells (also called WBCs or leukocytes), and in mammals platelets (also called thrombocytes). The most abundant cells in vertebrate blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates oxygen transport by reversibly binding to this respiratory gas thereby increasing its solubility in blood. In contrast, carbon dioxide is mostly transported extracellularly as bicarbonate ion transported in plasma.

Vertebrate blood is bright red when its hemoglobin is oxygenated and dark red when it is deoxygenated.

Some animals, such as crustaceans and mollusks, use hemocyanin to carry oxygen, instead of hemoglobin. Insects and some mollusks use a fluid called hemolymph instead of blood, the difference being that hemolymph is not contained in a closed circulatory system. In most insects, this "blood" does not contain oxygen-carrying molecules such as hemoglobin because their bodies are small enough for their tracheal system to suffice for supplying oxygen.

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. Arthropods, using hemolymph, have hemocytes as part of their immune system.

Blood is circulated around the body through blood vessels by the pumping action of the heart. In animals with lungs, arterial blood carries oxygen from inhaled air to the tissues of the body, and venous blood carries carbon dioxide, a waste product of metabolism produced by cells, from the tissues to the lungs to be exhaled.

Medical terms related to blood often begin with hemo-, hemato-, haemo- or haemato- from the Greek word αἷμα (haima) for "blood". In terms of anatomy and histology, blood is considered a specialized form of connective tissue, given its origin in the bones and the presence of potential molecular fibers in the form of fibrinogen.

Examples of use of blood
1. White blood, African blood, Indian blood: Hispanic, Latino.
2. More than 15,000 blood donors donate blood each year at the Abu Dhabi Blood Bank.
3. Freeblood.com also offers general information about blood and blood donation.
4. "There have been rivers of blood, innocent blood.
5. The National Blood Service said blood stocks were currently healthy and it could meet demand for blood products.