1. Body as a Whole RootMeaning adip/o; lip/o; steat/ofat axill/oarmpit bi/olife cephal/ohead cervic/oneck cyt/ocell hist/o; histi/otissue path/odisease viscer/ointernal organs

2. Respiratory System RootMeaning alveol/o air sac; alveolus bronch/o; bronchi/obronchus bronchiol/osmall bronchial tubes laryng/ovoice box; larynx nas/o; rhin/onose pharyng/othroat; pharynx phren/odiaphragm pneum/o; pneumon/o; pulmon/o lungs thorac/ochest trache/owindpipe/trachea

3. Musculoskeletal System RootMeaning arthr/ojoint chondr/o cartilage crani/oskull cost/orib myel/obone marrow (also means spinal cord) oste/obone pelv/o; pelv/ipelvis spin/ospine; spinal (vertebral) column; backbone vertebr/overtebra my/o; muscul/omuscle tend/o; tendin/otendon

4. Circulatory System RootMeaning angi/o; vascul/o; vas/ovessel arteri/oartery cardi/oheart hem/o; hemat/oblood ven/o; phleb/ovein

5. Nervous System RootMeaning blephar/oeyelid cerebr/o; encephal/obrain myel/ospinal cord (also means bone marrow) neur/onerve ophthalm/o; ocul/oeye ot/oear

6. Digestive System RootMeaning abdomin/o abdomen cheil/olips col/olarge intestine; colon enter/osmall intestine esophag/oesophagus gastr/ostomach gloss/o; lingu/otongue hepat/oliver or/o; stomat/omouth pharyng/othroat; pharynx (also part of the respiratory system) rect/orectum

7. Immune System RootMeaning adenoid/oadenoids lymph/olymph (clear, watery fluid) lymphaden/olymph glands; lymph nodes lymphangi/olymph vessels splen/ospleen tonsill/otonsils

8. Urinary System RootMeaning cyst/o bladder ren/o; nephr/o kidneys ureter/o ureters urethr/o urethra

9. Male Reproductive System RootMeaning epididym/oepididymis orchid/o; test/o; testicul/otesticle; testes phall/openis prostat/oprostate gland vas/oductus (vas) deferens

10. Female Reproductive System RootMeaning colp/o; vagin/ovagina gynec/ofemale mast/o; mamm/obreast oophor/o; ovari/oovary salping/ofallopian tubes; uterine tubes uter/o; hyster/o; metr/outerus vulv/ovulva; external genitalia

11. Endocrine System RootMeaning aden/ogland adren/oadrenal gland parathyroid/oparathyroid gland pituitar/opituitary gland thyroid/othyroid gland

12. Integumentary System RootMeaning cili/o; pil/ohair derm/o; dermat/o; cutane/oskin onych/o; ungu/onail