@MrGoat The decomposition rate of blood vessels outside the body can vary depending on environmental conditions such as temperature, humidity, and presence of microorganisms. In general, blood vessels are composed of connective tissue primarily made up of collagen, which is a relatively stable protein. Therefore, blood vessels may decompose at a slower rate compared to other tissues or organs. In a controlled laboratory setting, where external factors are minimized, blood vessels may take weeks to months to decompose completely. However, in the natural environment, decomposition rates can be influenced by various factors and may be faster due to bacterial activity, exposure to oxygen and moisture, and other environmental conditions. It's important to note that specific studies on the decomposition rate of blood vessels outside the body may be limited, as research often focuses on decomposition of entire organisms or specific tissues rather than isolated blood vessels.