The spleen is an organ in vertebrates. In people, it is on the left side of the body, under the heart. The spleen helps fight infections and keep the blood cells healthy.

Pízàng shì jǐzhudòngwù de qìguān. Rén de pízàng zài tǐnèi zuǒcè, xīnzàng xiàmiàn. Pízàng bāngzhù duìkàng gǎnrǎn hé bǎochí xuèxìbāo de jiànkāng.