What would be the effect on both the digestive system and the respiratory system if the human body did not contain a circulatory system?

Jake used to go surfing with his friends several times each week recently he has been spending a lot of time playing computer games what do you predict will be result of this change

Describe a time in the small group discussion when you drew on your preparation by referring to notes you had written earlier.

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.