Respuesta :

Answer:

Vertebrate red blood cells consist mainly of hemoglobin, a complex metalloprotein containing heme groups whose iron atoms temporarily bind to oxygen molecules (O2) in the lungs or gills and release them throughout the body. Oxygen can easily diffuse through the red blood cell's cell membrane.

Explanation:

Explanation:

The red blood cells are formed in the marrow of the bones and are released into the blood. The red colour of the blood is as a result of of presence of haemaeglobin in the red blood cells. Haemaeglobin is an iron compound which combines with oxygen to form oxyhaemoglobin. The red blood cells transports oxygen in the form of oxyhaemoglobin to tissues all over the body.