young appearance
fat
You have an ectomorph body build.
this refers to one of the 3 principle body types mesomorph, ectomorph, and endomorph endomorph describes a fat body type mesomorph--> muscular body type ectomorph--->thin/skinny body type
Ectomorph is a tall and thin body type.
ectomorph, mesomorph, and endomorph as far as I know.
mesomorph
Which body type is described as having a young appearance
An ectomorph is characterized to burn energy instead of storing it in body fat. Therefore, being an ectomorph and having a fatty stomach is somewhat uncommon. Getting rid of unwanted body fat is luckily pretty easy for an ectomorph (than it is for a meso- or an endomorph) as they easily burn calories. Try adjusting your diet, exercising and avoid eating refined foods and "empty carbs" such as sweets if you can. Eat fresh foods such as fruits and vegetables and if you can't bother with sports at least go jogging once in a while. Hope I could help.
check the trunk check the trunk
The answer to that is skin.
Law of conservation of momentum applies to any body on which no external torque is acting.
Discover your metabolism type. There are three basic metabolism types: ectomorph, mesomorph, and endomorph – definitely words you probably don't use in your normal, day-to-day conversations. But learning the types of body you were born with will help your fitness plan in the long run. I have placed a link in my bio that you can check out.