Excretion

1. The process in which urine is expelled

1.1. 1. Blood with waste flows to kidneys, nephrons in kidney filter blood, clean blood leaves kidneys

1.2. 2.Concentrated waste or urine flows to urine bladder, bladder holds urine till the urine can be expelled, urine leaves urethra

2. Kidney stones/diseases

2.1. Stone:When salt and waste collects to form a cyrstal

2.2. Disease:when irreaparable damage happens to kidneys,blood usually has to be filtered by a machine after,called dialysis

3. 3 types of exretion

3.1. lungs

3.1.1. The expelling of CO2 when you breath out

3.2. urine

3.2.1. The expelling of harmful substances from your blood

3.3. skin

3.3.1. The expelling of water and waste through your skin , called sweat

4. Bacterial infections

4.1. Usually,caused by holding waste to long

4.2. When bacteria gets into urinary bladder