What state sets most of the standards in fabric safety?

The head, neck, chest, abdomen, and groin are the location of major clusters of:

A) Lymphatic ducts B) Lymphangions C) Lymph nodes D) Precollector vessels

Which of the following acts as the "first-line" or immediate defense against the accumulation of H+ ions?

a. Blood buffer system b. GI tract c. Renal system d. Respiratory system