A correct balance of oxygen and carbon dioxide must be maintained in the human body to survive. Which system is responsible taking in oxygen and releasing carbon dioxide to the external environment to maintain this internal balance? A. the respiratory system
B. the circulatory system
C. the digestive system
D. the nervous system

Me with this psychology homework, i’m struggling with it.

Although the ideas of ren and li were originally buddhist principles, confucius adopted them as his own and they eventually became the center of confucian philosophy. select the best answer from the choices provided true or false

The ideas of hammond are most clearly an example of which of the following mid-19th century developments? (5 points) the increasingly liberal nature of slavery after the south enforced stronger slave codes the growing use by northern antislavery activists of moral arguments the increasing number of freed slaves in southern states as a result of gradual emancipation laws the growing tendency of southern slaveholders to use the paternal ethos to justify slavery