Waist circumference reflects the degree of in proportion to body fatness.

Waist circumference reflects the degree of visceral fat in proportion to body fatness. Visceral fat is the fat stored deeper in the skin such as the fat that surrounds the abdominal organs and excess of it can increase the risk of serious health problems. When taking the waist circumference, the body fat surrounding the waist is being measured together with visceral fat.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

voluntary muscles are controlled by the cerebellum.