They are carrying carbon dioxide and are from the venous part of the circularity system.
Dark red blood flowing from a wound indicates bleeding from the veins. Applying direct pressure to the wound can help to stop the flow of blood.
A rapid rise in the number of red blood cells
It loses oxygen!
Indirect bilirubin
Bright red blood is called frank blood, its fresher. Dark red blood is older blood that has been sitting for a while. The colour of fresh blood, say from an open wound, can be different due to variances in the number of red blood cells that person has. why this blood dark red? The amount of haemoglobin (red blood cells) that are in a person can differ slightly, this may cause some peoples blood to be darker than others if its fresh, otherwise see above...
Red blood cells (erythrocytes), are red in color because they contain hemoglobin. The heme component of hemoglobin contains iron, thus giving it a red color.
Biliverdin
Red blood cells contain hemoglobin. These cells are also known as erythrocytes.
Red blood cells because that is what carries oxygen throughout the body
1) Frog's red blood cells contain a nucleus that carries all the genetic information needed to make new cells by replication. Human red blood cells contain no nuclei because they reproduce differently than frog. 2) We human have platelets in our blood but frogs do not have them.
red blood cells
Red blood cells contain hemoglobin, but white blood cells do not