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.
Blood Components. Your blood is a fluid that connects all body cells. Not only does it bring nutrients and oxygen to the cells from the lungs and digestive tract, it carries waste products away from the cells for disposal. Your cells communicate with one another via the blood -- the liquid medium carries chemical messengers from one cell to another.