I’LL BE MAINLY USING WIKIPEDIA BECAUSE I’M LAZY [and some of my own notes not in italics]

SORRY FOR THE LONG POST

Red blood cells– also known as RBCs, red cells, red blood corpuscles, haematids, erythroid cells or erythrocytes, are the most common type of blood cell and the vertebrate’s principal means of delivering oxygen (O2) to the body tissues—via blood flow through the circulatory system. The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells.



The color of red blood cells is due to the heme group of hemoglobin. The blood plasma alone is straw-colored, but the red blood cells change color depending on the state of the hemoglobin: when combined with oxygen the resulting oxyhemoglobin is scarlet, and when oxygen has been released the resulting deoxyhemoglobin is of a dark red burgundy color.



NB: NOTE THAT HER CLOTHES COLOUR INVERTS WHEN SHE’S FINISHED DELIVERING THE OXYGEN –> AKA “DE-OXYGENATED”

First pic: Bright red colour on the outside + Dark red on the inside [collar + rolled up sleeves]

Second pic: Dark red colour on the outside + Bright red on the inside [collar + rolled up sleeves]

ALSO….

HER HAT IS LITERALLY A RED BLOOD CELL



An artery (plural arteries) is a blood vessel that takes blood away from the heart to all parts of the body (tissues, lungs, etc). The arteries are part of the circulatory system, which is responsible for the delivery of oxygen and nutrients to all cells, as well as the removal of carbon dioxide and waste products, the maintenance of optimum blood pH, and the circulation of proteins and cells of the immune system.

Endothelium refers to cells that line the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall. It is a thin layer of simple, or single-layered, squamous cells called endothelial cells. Endothelial cells in direct contact with blood are called vascular endothelial cells, whereas those in direct contact with lymph are known as lymphatic endothelial cells.

Neutrophils (also known as neutrocytes) are the most abundant type of granulocytes and the most abundant (40% to 70%) type of white blood cells in most mammals. They form an essential part of the innate immune system. Their functions vary in different animals.

Neutrophils are a type of phagocyte and are normally found in the bloodstream. During the beginning (acute) phase of inflammation, particularly as a result of bacterial infection, environmental exposure, and some cancers, neutrophils are one of the first-responders of inflammatory cells to migrate towards the site of inflammation.



Chemotaxis: Neutrophils undergo a process called chemotaxis via amoeboid movement, which allows them to migrate toward sites of infection or inflammation.

Neutrophils have a variety of specific receptors, including ones for complement, cytokines like interleukins and IFN-γ, chemokines, lectins, and other proteins. [AKA They respond when shit happens]

Veins are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood (CO2) from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart. Venous Valve: Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.

CONTINUE TO PART 2