By the Age of 2, a Human's Brain Weighs _____

question 5

Short Answer

By the age of 2, a human's brain weighs _____ percent of what it will weigh in adulthood.

---

Definitions:

Reservoirs for Pathogens

Environments or hosts that maintain and allow the transmission of disease-causing organisms.

Immunizations

The process by which a person becomes protected against a disease through vaccination.

Well-Balanced Diet

A diet that contains the correct proportions of carbohydrates, fats, proteins, vitamins, and minerals for optimal health and function.

Epidemic

The rapid spread of an infectious disease to a large number of people within a short period of time, geographically localized.