Absorption The process by which the nutrients in food are passed into the bloodstream Villi – Finger-like projections that are responsible for the majority of absorption, which takes place in the small intestine

Excretion the process of eliminating or expelling waste matter

Filtration the action or process of filtering something mixture

kidney One of a pair of organs located in the right and left side of the abdomen. The kidneys remove waste products from the blood and produce urine.

ureter One of the two tubes that carry urine from the kidneys to the bladder.

bladder A hollow organ in the lower abdomen that stores urine.

Urethra The tube that leads from the bladder and transports and discharges urine outside the body. ureth ra bladder ureter kidney