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.
When you get home, cut the leaves off, but leave about two inches of stems. 1  Boil some water and add the beets. 2  Cook the beets until they're tenderâabout 30 to 45 minutes. 3  Drain the beets and under cold water and remove the skins (they'll slip right off). 4  Slice off the tops and tips and cut the beets into cubes.