Which component of whole blood is primarily responsible for maintaining the pH of blood and body tissues within normal limits?

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

Discuss the functions of epithelial connective nerviud and muscular tissues

What are the responsibilities of the region of the brain highlighted below? =+= will rate brainiest =+=