Causes of famine. Famine can be caused by many different reasons, some, like floods, droughts, and earthquakes are natural, and others, like lack of food and shortage in food distribution to specific parts of a region, humans are responsible for.
Transportation: The cardiovascular system transports blood to almost all of the bodyâs tissues. The blood delivers essential nutrients and oxygen and removes wastes and carbon dioxide to be processed or removed from the body. Hormones are transported throughout the body via the bloodâs liquid plasma.
Help oxygenate your body by eating potatoes, a source of iron. Each of your cells relies on oxygen for cellular respiration -- the process by which cells generate energy. Proper oxygenation depends on your cardiovascular system, your heart and your blood vessels, which carry oxygen-rich blood throughout your body. Nutrients, including essential minerals, nourish your circulatory system so it can efficiently carry oxygen to your tissues via your bloodstream.