We all have 'mental health', just as we all have 'physical health'. And just like our physical health, we can all have times when our mental health is better than others.
Organ donation is when you decide to give an organ to save or transform the life of someone else. You can donate some organs while you are alive, and this is called living organ donation.
Blood cancer is a term that's used to describe many types of cancer that affect your blood, bone marrow or lymphatic system. It happens when something goes wrong with the development of your blood cells.