Complex sentence: Acid--base homeostasis is the part of human homeostasis concerning the proper balance between acids and bases, in other words, the pH. The body is very sensitive to its pH level, so strong mechanisms exist to maintain it.
Split into simpler sentences: Acid--base homeostasis is the part of human homeostasis concerning the proper balance between acids and bases. In other words, the pH. The body is very sensitive to its pH level, so strong mechanisms exist to maintain it.