In this course we provide an introduction on the building blocks of life (proteins, DNA, cel structures). Then, different aspects of kinetics in biology (from enzyme kinetics to population kinetics) are discussed mathematically. The common physical methods used for the determination of enzyme kinetics are described. In a next chapter, examples of applications of probability theory in biology are discussed. Afterwards, we discuss some thermodynamical aspects of biological problems. In this chapter, thermodynamical terms, such as the electrochemical potential, are being discussed. These concepts are important to understand the biophysics of the neuron, described in the next chapter. This last chapter forms the ideal transition to the last chapter on biomechanics, where we will see that motion is linked to both marcroscopic and microscopic aspects and a link will be provided to the earlier chapters.