In our biology class, our teacher told us to do a trash model of the urinary system as our last proyect of the year. For this proyect, I worked with Abril Teran Frías and now we are going to explain how we did it.
First, we look for a picture of the urinary system to know were each organ is supposed to be. This model should include the kidneys, the ureters, the bladder, the urethra, the renal veins, the renal arteries, the inferior vena cava and the abdominal aorta.
Second, we started the model. For the kidneys, we used old newspapers and magazines. For the ureters, we used shoelaces. Then, for the bladder, we used a tolem lid and for the urethra, a wine cork. Moreover, for the renal veins and renal arteries, we used thread. Finally, for the inferior vena cava and the abdominal aorta, we used straws.
Furthermore, we looked for the functions of each of this organs that form the urinary system. These are:
- Kidneys are bean-shaped organs of a reddish brown color that are found in the sides of the vertebral column. Once the body has extracted what it needs from food and drink, it sends the wastes to the kidneys. The kidneys filter the wastes, including urea, salt and excess water, which are flushed out of the body as urine. Each kidney is supplied with blood from the renal artery
- The ureter is a tube that carries urine from the kidney to the urinary bladder.There are two ureters, one attached to each kidney. The upper half of the ureter is located in the abdomen and the lower half is located in the pelvic area.The tube has thick walls composed of a fibrous, a muscular, and a mucus coat, which are able to contract.
- The bladder, also known as the urinary bladder, is an expandable muscular sac that stores urine before it is excreted out of the body through the urethra. It is located in the lower abdominal area near the pelvic bones.
- The Urethra is a tube which connects the urinary bladder to the outside of the body. It is responsible for allowing urine to leave the body as it empties from the bladder.
- There are two renal veins, a left and a right. They branch off the inferior vena cava and drain oxygen-depleted blood from the kidneys.As they enter the kidneys, each vein separates into two parts. The posterior veins assist in draining the back section of each kidney, while the anterior veins assist the front part. These veins also are responsible for draining blood from the ureter, which transports urine away from the kidneys to the urinary bladder.
- There are two blood vessels leading off from the abdominal aorta that go to the kidneys. The renal artery is one of these two blood vessels.The renal artery enters through the hilum, which is located where the kidney curves inward in a concave shape. Under normal circumstances, once the renal artery enters through the hilum, it splits into two main branches, which each then split into numerous smaller arteries, which deliver blood to different areas of the kidneys, known as nephrons.Once the blood has been processed here, it is sent back through the renal vein to the inferior vena cava and to the right side section of the heart.
- The inferior vena cava is a large vein that carries de-oxygenated blood from the lower body to the heart.
- The abdominal aorta is the largest artery in the abdomen that provides blood to the organs and tissues of the abdomen, pelvis, and legs. It descends from the thorax as a continuation of the thoracic aorta and branches several times to form the major arteries of the abdomen.
Finally, here we leave you a picture of our pryect finished: