portion 12 are preferably maintained stationary by means of a hook attached to the pin 24 for the simulation of the fastening of a human arm to the body the construction consisting of the outer ring liquid container 19 the inner cylindrical pipe 18 and the cylindrical fastening means 17 which can be rotated around the central axis of the pipe 18 provides a possibility of pivoting the distal portion 11 in relation to the fixed liquid container portion 12 and the proximal portion 13 thereby making it possible to simulate the rotational property of a human arm the groove 29 is formed in such a manner that the rotational potential of the distal portion 11 corresponds to that of a human arm fig3 shows a perspective view of the proximal portion 13 of the training apparatus 10 turned 45 degrees in relation to the position of the training apparatus as shown in fig2 it also shows the liquid level indicator 26 which as mentioned above extends over half of the circumference of the proximal portion 13 and a hook 40 which by insertion into the recess 23 can be brought into engagement with the pin 24 which is located in a tubular channel 41 to secure the proximal portion 13 furthermore fig3 shows a liquid indicator 42 consisting of a small piece of each of the tubes 31 and the above mentioned additional tube 43 for the simulation of the radial artery which pieces are located on the outside of the shoulder portion 21 the.