What is excretion?, Excretion is the process of removing waste substances produced in the body., In what ways are waste substances expelled from the body?, They are expelled in urine, sweat, breath and faeces., What system is responsible for the production, storage and elimination of urine?, The urinary system., What organs make up the urinary system according to the text?, The kidneys, the bladder and the urinary tract., What are kidneys described as in the text?, They are two bean-shaped organs., Where are the kidneys located?, At the back of the abdomen., Where is urine formed?, In the kidneys., What is the bladder?, It is a muscular bag that can expand., Where is urine stored?, In the bladder., What are ureters?, They are two tubes that carry urine from the kidneys to the bladder., What is the urethra?, It is the tube that carries urine from the bladder to outside the body., Why is physical exercise important according to the text?, It helps take care of the circulatory system, helps the digestive system, reduces constipation and benefits the respiratory system., Give two healthy diet habits mentioned in the text., Eat fibre and drink water..

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