What’s the name of a foreign material which can get inside your body and make u sick

Can ppl. develop self esteem, decision making..

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.

The human reproductive system uterusthe bird reproductive system eggs dropped