Mutual position of two circles in the coordinate system Simulation Play

Negative feedback mechanism Illustration Play

Nematodes Student activity Play

Nerve cells Illustration Play

Nerve centres Animation Play

Nerve centres in the brain Illustration Play

Nerve impulse Simulation Play

Nervous system Class activity Play

Nervous system Whiteboard presentation Play

Nucleus – the information centre Animation Play

Organs of the earthworm Whiteboard exercise Play

Pathway of a nerve impulse Animation Play

Pathway of the nerve impulse Whiteboard exercise Play

Points of intersection Student activity Play

Potential energy and the centre of gravity Student activity Play

Potential energy and the centre of gravity Whiteboard exercise Play

Propagation of a nerve impulse Slideshow Play

Propagation of impulses Slideshow Play

Properties of enlargements, part II Student activity Play

Proprioreceptors – muscle spindles Student activity Play

Quadratic model Whiteboard exercise Play

Quadratic model Student activity Play

Radio waves Student activity Play

Radius of inscribed and circumscribed circles Animation Play

Receptors activation thresholds Whiteboard exercise Play