jeongguk: your heart is a muscle the size of a rat

seokjin: SPONGE BOB SQUARE PANTS

taehyung: your brain's about four times the size of a cat's

seokjin: S P O N G E  B O B  S Q U A R E  P A N T S 

jimin: your lungs can hold 5.5 litres of air

seokjin: S  P O N G E BO B S Q U A I R P A  N TS E 

jeongguk: the soles of your feet can never grow hair