transportation

• function of transportation is to transport food, metabolic gases, waste products, hormones etc
• functions of blood is that is transports food, water, oxygen, and carbon dioxide
• maintenance of water balance is done by blood
• it protects our body from bacteria
• arteries carry oxygenated blood from our heart to various organs of our body whereas veins carry deoxygenated blood back to our heart
• the oxygen rich blood enters through the pulmonary vein and enters the left atrium and then through the bi-cuspid valve it enters the right ventricle then it exits through the aorta and is transported to the organs of our body
• carbon dioxide rich blood from the organs enter through the superior vena cava into the right atrium and then through the tricuspid valve it goes into the right ventricle and then out through the pulmonary artery and back to the lungs where it picks up more oxygen
• the blood follows two routes – one for oxygenated blood and the other for deoxygenated blood. Hence, the name “double circulation.” The majority of mammals, including humans utilize a double circulatory system.