They appear redder because they have picked up oxygen at the lungs.
Blood changes color at the lungs because it unloads carbon dioxide and absorbs oxygen. Red blood cells that are carrying oxygen are a brighter red color than red blood cells that are depleted of oxygen.
Red blood cells, corpuscles, transport oxygenated blood from the lungs to the body, and carbon dioxide from the body to the lungs.
The alveoli of the lungs are surrounded by capillaries. As the blood travels through the capillaries, the red blood cells become oxygenated and give up their load of CO2
Red blood cells
The blood cells responsible are red blood cells. White blood cells fight disease.
The red blood cells carry carbon dioxide back to the lungs.
The main function of blood cells in lungs is to carry oxygen and carbon dioxide throughout the body
red blood cells
The cells in blood that collect oxygen in the lungs are red blood cells (erythrocytes). They contain hemoglobin, a protein that binds to oxygen molecules as blood passes through the lung's alveoli. This allows red blood cells to transport oxygen from the lungs to tissues throughout the body. Additionally, they help in the removal of carbon dioxide from the tissues back to the lungs.
The hemoglobin protein in red blood cells is responsible for picking up oxygen in the lungs and transporting it to cells throughout the body. Hemoglobin binds to oxygen in the lungs and releases it to cells where it is needed for cellular respiration.
the lungs
Hemoglobin is what transports the oxygen in the red blood cells.