What are donut-shaped structures in the limbic system that jointly control a variety of functions relating to emotions and self - preservation?

Hippocampus and amygdala.

Explanation:

The hippocampus and the amygdala are part of the limbic system. This is responsible through these structures of emotions, memory and is decisive for the survival (self - preservation) of the human being. The hippocampus participates in the process of consolidation of some types of memory, it receives multiple afferents, through the neurons responsible for receiving sensations to transmit them to the brain, especially of the amygdala, which is considered as the main element or nucleus central involved in the management and control of emotions and feelings. It receives cortical afferences, is located in the depth of the temporal lobe and is connected to the entire brain, which denotes its integrative role in emotional processing.