Answer : controllable
Explanation: the second option
The factor that causes a noninfictious disease is the environment.
The right chamber( right atrium)
Answer:
the muscle tissues of arteries are thicker than the muscle tissues of veins.
Explanation:
the muscle tissues of arteries are thicker than those of veins because they carry oxygenated bloody to all the body parts(except the pulmonary artery)
Answer:
The question is incomplete, the missing part says: and suggests that maybe it is caused by stress. Hadad worries that there is something physically wrong, and he doesn't feel these symptoms are stress-related. What can he do?
He should visit another doctor or be persistent with his doctor.
Explanation:
Haddad should visit another doctor that may have a different point of view or run different tests on him. Another possibility is to keep visiting his doctor and claiming that he is not feeling well until the doctor finds out what is the problem with more tests or a deeper examination.
