by Katrina Cain. Tweet. The smallest blood vessels in the human body are capillaries. They are responsible for the absorption of oxygen into the blood stream and for removing the deoxygenated red blood cells for return to the heart and lungs for reoxygenation.he smallest capillaries in the body are in the brain. The brain uses an incredible amount of oxygen and therefore needs many blood vessels to bring in this oxygen and carry away the waste.
Once, Hutus and Tutsis lived in harmony in Central Africa. About 600 years ago, Tutsis, a tall, warrior people, moved south from Ethiopia and invaded the homeland of the Hutus. Though much smaller in number, they conquered the Hutus, who agreed to raise crops for them in return for protection.
The Hutu group of people is the largest group in Rwanda and they were mainly farmers .The tusti are the cattle keepers and they came in Rwanda looking for pasture and water for their animals. The TWA are the smallest group and they were mainly iron smelters.