1 Blood Cells: The most common types of blood cells are:  red blood cells (erythrocytes). The main function of red blood cells is to collect oxygen in the lungs and deliver it through the blood to the body tissues. Gas exchange is carried out by simple diffusion.
Rutherford and Bohr describe atomic structure1913. Photo: Niels Bohr's research notes for his new atomic theory. In 1911, Niels Bohr earned his PhD in Denmark with a dissertation on the electron theory of metals. Right afterwards, he went to England to study with J.J. Thomson, who had discovered the electron in 1897.
Lastet opp 1. mar. 2008. Episode 2 of In Search of Giants: Dr Brian Cox takes us on a journey through the history of particle physics. In this episode we learn how J.J. Thomson discovered the fist subatomic particle-the electron. This film is part of a series originally broadcast on Teachers' TV (http://www.teachers.tv/video/23645). The series was made with the support of The Science and Technology Facilities Council (www.scitech.ac.uk).