1. The common part of celery is the stem of celery. Celery leaves and stems contain apigenin, bergamot lactone and volatile oil. The content of potassium in celery stems is 1.5 times and 2 times that of leaves, but the content of vitamin E in celery leaves is almost 2 times that of celery stems, and vitamins B2 and C are more than 2 times that of stems.

2. Celery is an Umbelliferae plant. There are three kinds of cress, celery and celery with similar functions. Celery is rich in protein and carbohydrates. Celery was planted as an ornamental plant at first, and then it was eaten. After constant domestication and cultivation, it formed a slender petiole celery cultivation species, namely Benqin.