https://www.medscape.com/viewarticle/885777?src=WNL_trdalrt_171017_MSCPEDIT&uac=209383MV&jobid=1458470&faf=1
Here is an interesting article that discusses the use of hair as a suture that is easily available on the person’s own head. You can use the hair if you find yourself in the woods needing suturing but don’t forget cleanliness and sterile conditions