My name is Lauriana, im in 10th grade(Sophomore).. soo how old am I?

Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage

Adequate flourish intake during infancy and childhood cuts the incidence of tooth decay up to percent

Blood cells bring oxygen to cells and take carbon dioxide away. true or false