My teacher told me to name two things that hold water.

So I cheated

Blood plasma (intravascular compartment)
Interstitial fluid (between cells in tissues)
Inside cells (intracellular fluid)
Lymphatic vessels and lymph
Subcutaneous tissue (fat and connective tissue under the skin)
Muscles (high water content)
Organs (liver, kidneys, brain, lungs)
Breasts (glandular and adipose tissue)
Gastrointestinal tract contents
Bones (bound water within bone matrix)
Skin (stratum corneum holds surface-bound water; dermis contains interstitial water)
Mucous membranes (vaginal, nasal, oral)
Ovarian and uterine tissues (including fluid in follicles and uterine lining)
Adipose tissue (fat contains water, less than muscle)
Extracellular fluid that can accumulate as edema in ankles, feet, hands, or abdome