Blood is a specialized bodily fluid. In vertebrates, it is composed of blood cells
suspended in a liquid called blood plasma. Plasma, which constitutes 55% of
blood fluid, is mostly water (92% by volume),[1] and
contains dissipated proteins, glucose, mineral ions, hormones,
carbon dioxide (plasma being the main medium for
excretory product transportation), and blood cells themselves.
The blood cells are mainly red blood cells (also called RBCs or
erythrocytes) and white blood cells, including leukocytes and platelets.
The most abundant cells in vertebrate blood are red blood cells. These contain
hemoglobin, an iron-containing protein, which facilitates
transportation of oxygen by reversibly binding to this respiratory
gas and greatly increasing its solubility in blood. In contrast, carbon dioxide
is almost entirely transported extracellularly dissolved in plasma as bicarbonate ion.
Vertebrate blood is bright red when its hemoglobin is oxygenated. Some
animals, such as crustaceans and mollusks, use hemocyanin to carry oxygen, instead of
hemoglobin.
Arteries:
They are large vessels that take blood away from the heart, they have thick muscular walls which contract and relax.
Arterolie:
They are often to big to deliver the blood, so they split into smaller vessels called arterolies, they are very similar in structure and they push blood this is called peistalsis.
Venuoles:
They small veins, the transport the blood backwords towards the heart.
Veins:
They carry blood back to the heart, they are thinner and less muscular than arteries, one diffrence is they caontain valves.
suspended in a liquid called blood plasma. Plasma, which constitutes 55% of
blood fluid, is mostly water (92% by volume),[1] and
contains dissipated proteins, glucose, mineral ions, hormones,
carbon dioxide (plasma being the main medium for
excretory product transportation), and blood cells themselves.
The blood cells are mainly red blood cells (also called RBCs or
erythrocytes) and white blood cells, including leukocytes and platelets.
The most abundant cells in vertebrate blood are red blood cells. These contain
hemoglobin, an iron-containing protein, which facilitates
transportation of oxygen by reversibly binding to this respiratory
gas and greatly increasing its solubility in blood. In contrast, carbon dioxide
is almost entirely transported extracellularly dissolved in plasma as bicarbonate ion.
Vertebrate blood is bright red when its hemoglobin is oxygenated. Some
animals, such as crustaceans and mollusks, use hemocyanin to carry oxygen, instead of
hemoglobin.
Arteries:
They are large vessels that take blood away from the heart, they have thick muscular walls which contract and relax.
Arterolie:
They are often to big to deliver the blood, so they split into smaller vessels called arterolies, they are very similar in structure and they push blood this is called peistalsis.
Venuoles:
They small veins, the transport the blood backwords towards the heart.
Veins:
They carry blood back to the heart, they are thinner and less muscular than arteries, one diffrence is they caontain valves.