It is a single layer of cube-shaped cells. New epidermal skin cells, called keratinocytes, are formed in this layer through cell division to replace those shed continuously from the upper layers of the epidermis. This regenerative process is called skin cell renewal. As we age, the rate of cell renewal decreases.
Primates - marmosets, monkeys, apes, lemurs, humans. There are about 233 species in this order. Primates range in size from the tiny pygmy marmoset that weighs less than 3 ounces to the large mountain gorilla that weighs close to 400 pounds.Most species of primates are found in subtropical or tropical forests and many species live in trees. Primates have five fingers on their hand and five toes on their feet.
Photos.com/Photos.com/Getty Images. Primates are an extremely diverse group of between 190 and 350 living species, depending on different taxonomic structures, and exhibit a wide range of characteristic features that help distinguish them from other mammals.They range in size from the 2-ounce pygmy mouse lemur to the 440-pound wild gorilla.ther primate characteristics include having a nail on the first digit although, in many cases, each digit has a nail instead of a claw. Primates also possess a clavicle, or collarbone. All primates exhibit the tendency to be erect; this trait is visible when even quadrapedal primates sit or stand.