Asthma: do breathing treatments and make sure you take the medicanen you need for it .
Diabetes: dont eat to much sugar and take your medacine when you need to take it.
Cancer: take care of yourself eat what is good for you and exercise and drink plenty of water. and do physical things that are good for you too like riding bikes or reading books
The layer that encloses and protects the heart is
Pericardium
I guess it is called as Vulva
Without knowing the answer choices i think his waist is normal but the BMI should most likely be examined.