Construction is the process of constructing a building or infrastructure. Construction differs from manufacturing in that manufacturing typically involves mass production of similar items without a designated purchaser, while construction typically takes place on location for a known client.
Eutherians, often called placental mammals, have a unique reproductive system in which unborn young are nourished for an extended period via a placenta. This system permits retention of the young in the protective environment of the uterus during most of early development.
For example, humans and dogs both belong to the same kingdom, which is a level of classification used by scientists. Along with other mammals, they're part of Kingdom Animalia, which is broken into many categories. Today, you'll learn about one category of mammals: placental mammals. What Are Mammals? First, though, let's look at mammals in general.