Question

1 page note on blood
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Answer 1

Answer:

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.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.

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- or hemato- (also spelled haemo- and 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.

Explanation:

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Answer 2

Answer:

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.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.

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.