Dentin composes most of the root, which normally has pulp canals. The roots of teeth may be single in number (single-rooted teeth) or multiple. Canines and most premolars, except for maxillary first premolars, usually have one root. Maxillary first premolars and mandibular molars usually have two roots.
Ureter. 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 ureter is about 10 to 12 inches long in the average adult.The tube has thick walls composed of a fibrous, a muscular, and a mucus coat, which are able to contract. Ureter disorders include:he upper half of the ureter is located in the abdomen and the lower half is located in the pelvic area. The ureter is about 10 to 12 inches long in the average adult. The tube has thick walls composed of a fibrous, a muscular, and a mucus coat, which are able to contract. Ureter disorders include:
The ureter is the tube that connects each kidney to the bladder. The kidneys clean the blood and filter waste from it. This process produces a liquid waste, urine.Urine flows â¦ from the kidneys through the ureters to the bladder. The urine is stored in the bladder until a person urinates.During urination, the urine leaves the body by passing from the bladder through another tube, the urethra, which is open at one end. in humans, ureters are two pairs of long muscular tubes (about 25-30cm) that carry urine from kidneys to urinarry bladders.n example of this is a duplicate ureter, where there is an extra ureter running from a kidney to t â¦ he bladder. Uterocele is a narrowing of the ureter which could cause urine to back up into the kidneys and damage the kidney. This is usually caused by a small tumor or hernia.