近年来，作为一种新的保险方式，“脐带血储存”引起了国人的关注。用该业务的广告语来说，这是孩子的“生命银行”。以脐带血作为“生命银行”，是利用脐带血中的（   ）

根据所给汉语完成下列句子，词数不限。

Swimmers Wanted
Can you swim? Do you like kids? Can you help them with swimming on weekends? Come and join us. Call Jane at 330-8976 for more information(信息).
Chess Club
Do you like to play chess? Mr Chen can teach you. You can come here every Friday afternoon.
Tel: 623-1940
Add: Room 102 in School’s P.E. Building
Let's Learn French
Can you speak French? Do you want to learn French? Join the French club now.
Time: 9:00 am—11:30 am(from Monday to Friday)
Call Henry at 543-1248.
Musicians Wanted
Boys and girls, are you music lovers? Can you sing or dance? Can you play any instruments(乐器)? Welcome to our Star Rock Band.
Please call Victor at 891-3453 or send an email to music@yahoo.com.
根据以上内容，选择最佳答案。