what is the immune system? by https://padlet.com/karen_langan1/uddsuf6xichz Happy Birthday! en-us 2017-04-10 17:17:58 UTC 2017-04-25 03:10:23 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Terminator.png it is important karen_langan1 https://padlet.com/karen_langan1/uddsuf6xichz/wish/165731813 2017-04-10 17:19:02 UTC https://padlet.com/karen_langan1/uddsuf6xichz/wish/165731813 it starts at the throat karen_langan1 https://padlet.com/karen_langan1/uddsuf6xichz/wish/165731871 2017-04-10 17:19:14 UTC https://padlet.com/karen_langan1/uddsuf6xichz/wish/165731871 it can't fight everything karen_langan1 https://padlet.com/karen_langan1/uddsuf6xichz/wish/165732175 2017-04-10 17:20:26 UTC https://padlet.com/karen_langan1/uddsuf6xichz/wish/165732175 it is part of your body karen_langan1 https://padlet.com/karen_langan1/uddsuf6xichz/wish/165732696 2017-04-10 17:22:43 UTC https://padlet.com/karen_langan1/uddsuf6xichz/wish/165732696 it prevents sickness karen_langan1 https://padlet.com/karen_langan1/uddsuf6xichz/wish/165732859 2017-04-10 17:23:29 UTC https://padlet.com/karen_langan1/uddsuf6xichz/wish/165732859