Compléter AnalogiesVersion en ligne Analogies par Gabriela Hermosillo 1 tick string bread pump orange hollow a slice clock tock an a of of ball around pear fist peel 1 . The shape of the heart is similar to a . 2 . The walls of the heart are fairly thick , approximately like a , at the bottom . On the top , they ? re thinner , about as thin as . 3 . The strips of muscle at the bottom of the heart are like . 4 . The heart is so small . It ? s only slightly larger than a tightly closed . 5 . That ? s the heartbeat . Contraction and relaxation ? very regular and even ? the beat is just like the . 6 . The heart is similar to a . Basically , it pumps blood to the rest of the body