Experiment set BIOLOGY 2: SKIN and HAIR
![](https://mekruphy.com/en/wp-content/uploads/2020/07/BIOLOGIE-2_HH-1024x791.jpg)
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