Which kind of joint does the neck have to allow such movements shown in the image below?
Ramya likes to play volleyball and goes to a training camp to be trained by a coach. Ramya's coach makes sure that before he teaches anything to Ramya, Ramya must do warm-up exercises. She starts with stretching his neck in the horizontal and vertical directions. Can you tell which kind of joint does the neck have so as to allow such movement?
Following the neck, an athlete spreads out his/her arms and makes big wide circles. Which kind of structural arrangement in the shoulders allows such movement?