Can hiviaids be transmitted from one person to another without any fomm of sexual contact and why?

No it can be transmitted through sex actions only. The action of sex is more physical which causes the disease to enter the other body. And contributes to receiving the disease.

Difference between normal and abnormal tissue is much clearer on mri than on ct and mri much suitable to view soft tissues

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.