There are many different cell types and sub-types involved in the immune system. Some of the main types include: Lymphocytes: are white cells which circulate between blood and lymph. They play an important role in fighting infection.
After about 50 to 60 days, beets are ready to harvest. Not only can the roots be dug up and chopped to add flavor to a meal, but the greens of the beets can be harvested periodically and put in salads. Given how well these beets fare in different weather conditions, they can be grown several times in a summer.
Soak beet seeds in water for 24 hours before planting to aid germination. Beets prefer cool weather. For an early summer crop, sow seeds in a sunny spot, 3 to 4 weeks before your last frost.ast spring I experimented and sowed baby beet seeds between rows of onions. February 2012 Update: You'll find more about growing beets in this new post, Garden Journal 2/25/12: Sorting Through My Seed Stash, Beet Growing Tips, and Planting by the Moon.