Stomach walls are so thick thin medium-sized red( thick, thin, medium-sized, red ) so that acid cannot build-up make it blue eat away the flesh create new flesh( build-up, make it blue, eat away the flesh, create new flesh )

Excretion is the process of removing unwanted 3G metabolic salty unmetabolised( 3G, metabolic, salty, unmetabolised ) waste from the body. The main organs of the excretory system are the gall bladder venules ureters kidneys( gall bladder, venules, ureters, kidneys ). These organs filter wastes like urea and excess salts urine ammonia sugars( salts, urine, ammonia, sugars ) and water from the body. This waste then travels down the kidney stones dorsal aorta urethra ureter( kidney stones, dorsal aorta, urethra, ureter ) to the bladder. When the bladder is full, urine is expelled from the body via the bladder urethra vena cava ureter( bladder, urethra, vena cava, ureter ).

The main function of the human urinary system is to remove urine (OMG I didn't know that!). Urine contains excess money salts stones proteins( money, salts, stones, proteins ), excessive water sugars hormones blood( water, sugars, hormones, blood ) and nitrogen-based homogenous nitrogenius carbon-based( nitrogen-based, homogenous, nitrogenius, carbon-based ) wastes which include urea which is a by product of breaking down ammonia M&Ms amenities Amsterdam( ammonia, M&Ms, amenities, Amsterdam ),