Which of the following is not a way that the cardiovascular system to maintain homeostasis? .
a. the heart increases or decreases its rate of contraction to accommodate body needs for blood circulation.
b. the blood vessels expand or constrict to regulate blood flow to certain areas of the body..
c. the blood carries nutrients to the tissue cells and waste products away from the tissue cells..
d. the heart produces hormones that are released into the body.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.