excretion

Question 1

hilum

Answer 1

depression where renal artery, renal vein and nerves are connected to the kidney

Question 2

kidney

Answer 2

bean-shaped organ, remove urea and extra water from the blood (as urine) and keeps chemical concentrations (such as sodium, potassium, and calcium) balanced in the blood

Question 3

ureter

Answer 3

narrow tube that emerges from the hilum, brings urine from each kidney to the urinary bladder

Question 4

urinary bladder

Answer 4

elastic, muscular bag in front of the rectum that stores urine

Question 5

sphincter muscle

Answer 5

found at the bottom of the bladder, controls urine flow into urethra and out of the body

Question 6

urethra

Answer 6

duct through which urine passes from the urinary bladder to outside of body

Question 7

renal arteries

Answer 7

bring oxygenated blood containing urea and excess water from the heart to the kidneys

Question 8

renal veins

Answer 8

bring deoxygenated blood (from which urea and excess water have been removed) away from the kidneys to the heart