The main types of immune cells are white blood cells. There are two types of white blood cells â lymphocytes and phagocytes. When weâre stressed, the immune systemâs ability to fight off antigens is reduced.That is why we are more susceptible to infections.here are two types of lymphocytes : B cells-produce antibodies which are released into the fluid surrounding the bodyâs cells to destroy the invading viruses and bacteria. T cells (see picture opposite) - if the invader gets inside a cell, these (T cells) lock on to the infected cell, multiply and destroy it.
Editor's Description: Introduction to Art: Design, Context, and Meaning offers a comprehensive introduction to the world of Art. Authored by four USG faculty members with advance degrees in the arts, this textbooks offers up-to-date original scholarship.
However, since European and American design is the base from which we are operating here, it is in this culture we will begin. We will eventually look at other cultural approaches to aesthetics and design. In this section, first we will define some basic terminology essential to the understanding of visual language. We will then look at the elements of design, or the components which form the structure of a work. Finally, we will consider the design principles, the concepts used to organize the structural elements. The principles and elements of design are the basic building blocks of visual composition, and in order to understand how visual images carry meaning, we need to understand this basic vocabulary of visual language.