[김홍표의 과학 한 귀퉁이] lungs are light
Humans have two lungs. the left one is a bit smaller It is because it makes room for the left-leaning heart.
Humans have two lungs. the left one is a bit smaller It is because it makes room for the left-leaning heart.
Hosted by Byohosting - Most Recommended Web Hosting - for complains, abuse, advertising contact: o f f i c e @byohosting.com