Urinary System Flashcards
Urinary system consists of: (in order of how urine is expelled)
2 kidneys
2 ureters
Urinary bladder
Urethra
Kidney function:
Filters blood
Ureter function:
Tubes that transport urine to the bladder, where urine is stored before urination through the urethra to the outside
Nephrons:
Filters blood by removing waste material and return the substances we need in our blood
Filtration process of blood in the kidneys:
- Occurs through the glomerulus in Bowman’s capsule of the nephron under the force of blood pressure
- Components needed by the body such as water, glucose, and ions leave the nephron by diffusion and reenter the blood
- Water is reabsorbed at the tubules of the nephron
Glomerulus:
Filters blood via capillaries by removing proteins
Renal corpuscle consists of:
Glomerulus and bowman’s capsule
Bowman’s capsule:
Entrance to proximal convoluted tubule, covers glomerulus
Renal tubules (proximal and distal):
Regulates blood osmolarity, pH, and absorption of electrolytes (sodium, chloride, potassium)
Kidney structure:
Outer renal cortex with an inner renal medulla
Decrease in blood pressure causes:
- Secretion of renin
- Activates ADH that causes increased reabsorption of sodium ions and water
- Raises blood volume and pressure and decreasing urine output