After a baby is born and the umbilical cord is cut, some blood remains in the blood vessels of the placenta and the portion of the umbilical cord that remains attached to it. After birth, the baby no longer needs this extra blood. This blood is called placental blood or umbilical cord blood: 'cord blood' for short.
The easiest way to tell indica vs sativa is to look at the leaves. A true sativa is a tall, scraggly looking plant with wiry stocks and thin leaves. In contrast, indica plants are short and bushy. Indica leaves are usually broad and full. Sativas are native to the warm climates of Mexico, Central America, and Southeast Asia.
Cannabis Sativa grow taller and thinner than Indica strains. Sativa strains originated in the equatorial countries of Columbia, Mexico, Thailand, and South East Asia and thrive in warmer weather. The leaves of Sativa are much more narrow than those of Indica, and are typically a lighter shade of green. Sativa plants have known to stretch to extraordinary heights of up to 20 feet when grown outside, and have much longer vegetation periods.