They can constrict or dilate because their walls are muscular.
Answer:
im not completely sure but if a person is eating unhealthy food and doesnt care for their body thats the person who engages in habits most harmful to his/her body.
Explanation:
Not attempting could lead to not getting it at all. attempting to can potentially get you the money which is an advantage
Answer:
B
Explanation: It is very easy to make small mistakes like not paying attention to whether it says AM or PM. So, hospitals use 24 hour time to prevent any possible mistakes with the time :)