What is an easy way to calm down what u get no time to urslef

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

Which respiratory measurement as useful in differentiating between obstructive and restrictive pulmonary dysfunction

True or false a fertilized cell divides many times to form an embryo