Urinary system Lab 10

Kidney Bean-shaped organs lying along dorsal wall of the abdominal cavity Produce urine Renal cortex Renal medulla Renal pelvis Nephron

Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.

Each nephron composed of several parts

Urine formation three steps  Glomerular filtration Small molecules (Aa, Glucose, H 2 O, salts, urea) → glomerular Capsule  Tubular reabsorption Aa, Glucose, H2O, salts, urea → blood vessel (blood pressure & PH)  Tubular secretion H + ions, ammonia… → tubule

Kidneys functions Excreting nitrogenous wastes Contributing to homeostasis * : – Maintaining acid–base balance – Regulating blood pressure (via maintaining salt and water balance) *Homeostasis is the property of a system that regulates its internal environment and tends to maintain a stable, relatively constant condition of properties such as temperature or pH.

Transportation of the urine

Urinalysis

1.Watch the model of urinary system and identify the four parts 2.Kidney dissection—observe and identify the structure of kidney 3.Prepared slides observation—observe and identify the substructure of kidney 4.Urinalysis—what are the constituents of normal urine