what is blood ? write a short note on blood in 150 words
Answers
Explanation:
Blood donation is an activity when a person donates blood to someone who is in need of it. Blood is an essential body fluid which may be lost due to certain injury or other medical condition, thereby raising the need for its transfusion from a different source. It is a life-saving activity that can hugely impact the life of the patient and his/her dependants.
Blood donation not only saves the life of the affected but also has several health benefits on the donor also. Regular blood donation helps maintain an appropriate iron level in the body thereby preventing many ailments caused due to iron excess. Also, it promotes the formation of new blood vessels, thereby increasing the overall health of the donor.
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Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.[1]
Blood
Venous and arterial blood.jpg
Venous (darker) and arterial (brighter) blood
Details
Identifiers
Latin
haema
MeSH
D001769
TA98
A12.0.00.009
TA2
3892
FMA
9670
Anatomical terminology
[edit on Wikidata]
In vertebrates, it is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume),[2] 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 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 and greatly increasing its solubility in blood. In contrast, carbon dioxide is mostly transported extracellularly as bicarbonate ion transported in plasma