As far as we are aware, there are three different opioid receptors in the body: mu (µ), delta (δ) and kappa (κ). This is interesting for a

As you may know, iron is contained within a large protein known as haemoglobin. Haemoglobin is produced in the liver and bone marrow.

peptidoglycan is the body of the yo-yo, while the amino acid chain is the flailing string. As you would expect, on their own, a cluster of

Your lungs resemble a tree. The trunk is akin to your trachea (or windpipe), while the branches are like the bronchi, which gradually reduc