2. Try Tribulus Terrestris Cartilage is a firm but pliable connective tissue in the joint. It protects and exerts pressure on the joints by absorbing the pressure and vibration generated during the movement. This reduction in the normal amount of cartilage tissue can cause some forms of arthritis. Most people try and protect the iPhone's sensitive touchscreen technology, but forget that you have open orifices around the iPhone that can be susceptible to outside irritants. The iPhone's headphone jack is often left unprotected, even from iPhone protective cases. This is done so that you have easy accessibility to the headphone jack continually. It is useful to help keep it open, however you still have to clean inside and protect as best as possible. Here are some tips for protecting your iPhone's headphone slot. The most common species are: the African Spurred tortoise (Geochelone Sulcata), the spotted turtle (Clemmys guttata), the wood tortoise (Clemmys insculpta), the green turtle(Chelonia) the Blunding?s turtle ( Emydoidea Blundigii), Trachemys s. elegance (red-eared slider) along with the diamondback terrapin (Malaklemys terrapin). Pediatric rheumatologists are doctors who specialize in providing comprehensive care for children (and their families) who have rheumatic diseases, especially arthritis.