Experiment set BIOLOGY 2: SKIN and HAIR


The skin serves a lot of functions 

The human skin is more than just a covering for the body. It is a complex sensory organ that fulfils a multitude of tasks, above all protective and regulatory functions. In a series of simple but fascinating experiments, the pupils investigate how the skin’s cold, heat and pressure receptors are distributed, take fingerprints and recognise them as being unique to the individual, learn to read a piece of Braille text, experience the effect of evaporative cooling and wrinkled skin and examine sunscreen with different protection factors.

Human hair

Human head hair is between 0.04 and 0.12 millimetres in thickness and grows 0.3 to 0.5 millimetres per day. While the primary function of scalp hair is to protect the head against cold and the sun, the purpose of eyebrows is to protect the eye from sweat from the forehead and the eyelashes help prevent foreign bodies from entering the eye. It is possible to identify the structure of human hair under a microscope. The pupils perform a very impressive experiment to investigate how much load a human hair can withstand.


01.01.10 Storage case

36.02.00 Inlay with cut-outs for apparatus, B2

30.03.20 Hand-held magnifying glass, 6x

36.04.00 Ink pad

01.05.00 Vernier calliper

43.06.00 3 Plastic beakers, 100 ml

43.07.00 Bosshead clamp G3

46.08.00 Box with 4 balls

36.09.00 2 Heat sensors

36.10.00 Velcro and rubber bands in box

36.11.00 Sheet with Braille

03.12.00 Pin with hook, 7 cm

10.13.00 Digital thermometer W2

36.14.00 Plastic plate, black

30.16.00 50 Slides with field for labelling

01.18.00 2 Stand rods, 29 cm

36.18.00 2 Small collars with hook and slot

01.19.00 Measuring tape, 2 m

02.20.00 Weight, 50 g, with slot

02.21.00 5 Weights, 10 g, with slots

54.24.00 Weight holder, short 11.28.00 Weight, 40 g, with slot

36.29.00  Black container with 50 UV-sensitive pearls


B2 – 1:   The skin in close-up

B2 – 2:   The skin as a personal ID card

B2 – 3:   The skin as a detective

B2 – 4:   The skin as a reading device

B2 – 5:   The spatial discrimination threshold

B2 – 6:   Temperature sensitivity of the skin

B2 – 7:   Heat and cold receptors

B2 – 8:   The release of water by the skin

B2 – 9:   Evaporative cooling

B2 – 10: Wrinkly skin

B2 – 11: The effect of sunscreen

B2 – 12: Protective functions of hair

B2 – 13: Hair under the microscope

B2 – 14: Hair under mechanical load