placenta. n, pl-tas or-tae (-tiË). 1. (Anatomy) the vascular organ formed in the uterus during pregnancy, consisting of both maternal and embryonic tissues and providing oxygen and nutrients for the fetus and transfer of waste products from the fetal to the maternal blood circulation.
Definition. To be brief, optimal health is an individual person's physical, emotional and mental health abilities. That is, it is the health goals that a person can realistically achieve to feel their personal best. No two people's health goals are the same, that's why optimal health is such an individualized matter. One person might focus on physical health while to another healing emotional wounds is a more pressing matter. It really just depends on what is important to you.
Definitions for environmental health. Environmental health. Environmental health is that branch of public health that is concerned with all aspects of the natural and built environment that may affect human health. Other phrases that concern or refer to the discipline of environmental health include environmental public health, and environmental protection.