The cells of the innate system recognize and respond to pathogens in a generic way, but, unlike the adaptive immune system (which is found only in vertebrates), it does not confer long-lasting or protective immunity to the host.ll white blood cells (WBC) are known as leukocytes. Leukocytes are different from other cells of the body in that they are not tightly associated with a particular organ or tissue; thus, they function similar to independent, single-cell organisms.
Ideally, the age to bring home a puppy is when heâs between seven and twelve weeks old. This is considered the critical socialization period in a puppyâs life, the time when he learns the most about his environment and begins to adjust to his surroundings.
8 weeks is the standard time to take home a puppy as although they are weaned at 5 weeks they still need to learn things from their mother and their litter mates as well as gaining important time socialising.ood question. 8 weeks is the youngest you can bring home a new puppy, because being able to leave its mother is not all about being able to be fed by her.