Essentially, the ureters are passageways that carry urine from the kidneys to the bladder through contraction of the smooth muscle layers in their walls that propel urine into the bladder by peristalsis and is prevented from flowing back by small valve-like folds of bladder mucosa that flap over the ureter openings.
The kidneys then process this filtrate, allowing wastes and excess ions to leave the body in urine while returning needed substances to the blood in just the right proportions.
The kidneys alone perform the functions just described and manufacture urine in the process, while the other organs of the urinary system provide temporary storage reservoirs for urine or serve as transportation channels to carry it from one body region to another.
One of the main structures of a nephron, a glomerulus is a knot of capillaries. When a person consumes a large amount of water, the kidneys reduce their reabsorption of water to allow the excess water to be excreted in urine. Atop each kidney is an adrenal gland, which is part of the endocrine system is a distinctly separate organ functionally.
At the same time, waste products present in the blood are secreted into the filtrate. Small cortical radiate arteries then branch off the arcuate arteries and run outward to supply the cortical tissue. Medial to the hilum is a flat, basinlike cavity, the renal pelvis, which is continuous with the ureter leaving the hilum.
The outer region, which is light in color, is the renal cortex. An adult kidney is about 12 cm 5 inches long, 6 cm 2. Normal urine is sterile. Kidneys also regulate the acid-base balance and conserve fluids.
The bladder, located in the pelvis between the pelvic bones, is a hollow, muscular, balloon-shaped organ that expands as it fills with urine. When blood pressure is elevated, the kidneys can help to reduce blood pressure by reducing the volume of blood in the body.
At the same time, the brain signals the sphincter muscles to relax to let urine exit the bladder through the urethra. The kidneys filter metabolic wastes, excess ions, and chemicals from the blood to form urine. Urethra The urethra is a thin-walled tube that carries urine by peristalsis from the bladder to the outside of the body.
Production of Hormones The kidneys produce and interact with several hormones that are involved in the control of systems outside of the urinary system. The body takes nutrients from food and converts them to energy. Although the lungs and the skin also play roles in excretion, the kidneys bear the major responsibility for eliminating nitrogenous wastes, toxins, and drugs from the body.
This tube allows urine to pass outside the body. What clinical trials are open? The brain signals the bladder muscles to tighten, which squeezes urine out of the bladder. Aldosterone then changes the function of the kidneys to increase the reabsorption of water and sodium ions into the blood, increasing blood volume and raising blood pressure.The Urinary System • The urinary system is composed of paired kidneys and ureters, the urinary bladder, and the urethra.
• Urine is produced in the kidneys, and then drains through the ureters to the urinary bladder, where. Kidney and urinary system parts and their functions. Two kidneys. This pair of purplish-brown organs is located below the ribs toward the middle of the back. The urinary system consists of two kidneys, two ureters, a urinary bladder, and a urethra.
The kidneys alone perform the functions just described and manufacture urine in the process, while the other organs of the urinary system provide temporary storage reservoirs for urine or serve as. NAME _____ LAB TIME/DATE _____ REVIEW SHEET exercise40 Anatomy of the Urinary System Review Sheet 40 Gross Anatomy of the Human Urinary System.
Anatomy of the urinary system How does the urinary system work? The body takes nutrients from food and converts them to energy. After the body has taken the food that it needs, waste products are left behind in the bowel and in the blood. What is the urinary tract and how does it work?
The urinary tract is the body’s drainage system for removing urine, which is composed of wastes and extra fluid.
In order for normal urination to occur, all body parts in the urinary tract need to work together in the correct order. Kidneys.Download