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.
The sativa high is thought of as being uplifting and optimistic. It is also said that since sativas contain a very high THC content, they are best for dealing with certain pain symptoms. The indica variety is a short plant that typically does not reach over eight feet in height. Its marijuana leaves are usually dark green and have short, wide fingers. As the plant matures the grower is more quickly able to spot a dash of purple in the deep green leaf.