In 2 to 3 sentences, how does the circulatory system respond to stimuli to maintain homeostasis?

Explanation:

Blood vessels such as arteries, veins, and capillaries can dilate and constrict to help the body maintain homeostasis. When sensors in the body detect an increase in core temperature, vessels dilate to allow more blood to pass through them which releases the excess heat.

the answer is c

explanation:

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.