Explain one beneficial and one harmful effect of exposure to sunlight for humans.

Trace the pathway of a bite of hamburger through the digestive system.

How is the volume of the chest cavity increased during inhalation?

Question

Explain one beneficial and one harmful effect of exposure to sunlight for humans.

Trace the pathway of a bite of hamburger through the digestive system. 

How is the volume of the chest cavity increased during inhalation?

anonymous · Answer

a)The beneficial aspect of sunlight is that it stimulates the formation of Vitamin D. A harmful effects of sunlight vary,the foremost being DNA damage like sun cancer.
b)Mouth, Esophagus,Stomach,Small Intestine,Large Intestine
c)The diaphragm is normally dome-shaped & arches up into the chest cavity, but during inhalation it contracts & flattens down, and at the same time, the intercostal muscles expand the ribcage; these two actions increase the chest capacity by up to 75%.

anonymous · Answer

@iron0man