ETYM Old Eng. blod, blood, AS. blôd; akin to Dutch bloed, Old High Germ. bluot, German blut, Goth. blôth, Icel. blôth, Swed. and Dan. blod; prob. from the same root as Eng. blow to bloom. Related to Blow to bloom.
Fluid circulating in the arteries, veins, and capillaries of vertebrate animals; the term also refers to the corresponding fluid in those invertebrates that possess a closed circulatory system. Blood carries nutrients and oxygen to each body cell and removes waste products, such as carbon dioxide. It is also important in the immune response and, in many animals, in the distribution of heat throughout the body.
In humans blood makes up 5% of the body weight, occupying a volume of 5.5 l/10 pt in the average adult. It is composed of a colorless, transparent liquid called plasma, in which are suspended microscopic cells of three main varieties.
Red cells (erythrocytes) form nearly half the volume of the blood, with about six million red cells in every milliliter of an adult’s blood. Their red color is caused by hemoglobin.
White cells (leukocytes) are of various kinds. Some (phagocytes) ingest invading bacteria and so protect the body from disease; these also help to repair injured tissues. Others (lymphocytes) produce antibodies, which help provide immunity.
Blood platelets (thrombocytes) assist in the clotting of blood.
Blood cells constantly wear out and die and are replaced from the bone marrow. Red blood cells die at the rate of 200 billion per day but the body produces new cells at an average rate of 9 billion per hour.
Arterial blood, which is rich in oxygen, is bright red in color; venous blood, containing little oxygen, is dark red. Blood is slightly heavier than water (specific gravity 1.06) and has an alkaline reaction. It has a circulatory movement, being pumped through the arteries and veins by the heart.
1. People viewed as members of a group.
2. Temperament or disposition.
3. The fluid (red in vertebrates) that is pumped by the heart.
Narav, ćudljivost.
Krv je tečnost koja cirkuliše telom noseći kiseonik i hranu telesnim ćelijama, a od njih preuzima ugljen-dioksid i otpadne produkte.
Tečnost u žilama, tečno tkivo, tečnost koja neprestano kruži u telu kroz naročite cevi, nazvane krvni sudovi ili žile, zahvaljujuči radu srca. Na taj način krv prodire u sve organe tela i dolazi u dodir sa njihovim ćelijama. Uloga krvi je višestruka i veoma važna za život i rad ćelija, odnosno organa, a sastoji se u prenošenju raznih materija. Ona predaje organima kiseonik i hranljive materije, a prima od njih ugljen dioksid i nepotrebne sastojke razgrađenih materija. Ove nepotrebne sastojke predaje organima za islučivanje..
U telu prosečnog čoveka ima je 5 do 6 litara.
1. Veća grupa srodnih bića - životinja ili ljudi - sa istorodnim glavnim oznakama, podobnostima, težnjama, navikama, i sa istorodnim duševnim ustrojstvom, pleme, loza, rod; poreklo, koleno, pasmina.
2. Istorijski nastala skupina ljudi koja ima neke zajedničke osobine: boju kože, očiju, oblik lobanje, uzrast i dr. (žuta, bela rasa i dr.);
3. narod; ljudi koji se odlikuju ili se razlikuju od drugih nekim posebnim osobinama, soj; specifična osobina, odlika, originalnost, individualnost;
4. Skupine istovrsnih životinja koje imaju zajedničko poreklo, slične telesne osobine a prilagođene su određenim životnim uslovima, pasmina. (fr.)
Srodstvo. Rodbina, svojta.
Narav, ćud, skup sklonosti nekog čoveka, oblik stanja svesti, naročito čuvstvenosti ili osećajnosti, koji u nekom čoveku preovlađuje; po Loceu: "formalne i stepenske razlike u uzbudljivisti prema spoljnim utiscima u većoj i manjoj obimnosti s kojim izazvane pretstave izazivaju druge, u brzini kojom se pretstave menjaju, u jačini kojom se za te pretstave vezuju osećanja radosti ili turobnosti, najzad u lakoći s kojom se za ta unutrašnja stanja vezuju i spoljnje radnje" (up. kolreičan, melanholičan, sangviničan, flegmat
To smear with blood, as in a hunting initiation rite, where the face of a person is smeared with the blood of the kill.