Many subcortical structures, such as the hippocampus and amygdala, come in groups of two. why? a. anatomy involves symmetry. b. there is a hindbrain and midbrain. c. it has to do with lateralization. d. none of the above

The right answer is a.anatomy involves symmetry.

In the anatomy of multicellular animals with bilateral symmetry (which form the subregion of bilateria), there are many even organs, that is to say composed of two symmetrical halves, generally positioned on both sides of the median plane. This is the case, for example the human brain that includes two hemispheres, two amygdalas and two hyppocampus, a left and a right.

2%? i tried finding the exact sorry if it's not 100% correct ; -;

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.