001. Learning Vocabulary

a long, continuous tube in the body through which the food coming from the stomach moves and is passed

the body part inside our body where the food that we eat goes

a vital organ in the body that cleans the blood of harmful substances

each of the two bean-shaped organs in the lower back of the body that separate wastes from the blood and make urine

the body part that pushes the blood to go to all parts of our body

a particular combination of words that are used together very often

(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other