# Chapter 5 Numbers, Positions, and Directions Examples of

Chapter 5 Numbers, Positions, and Directions Examples of Prefixes for Numbers Prefix Uni(mono) TriQuadriSeptiNonaMultiHemi- Meaning One Examples Unilateral Three Four

Seven Nine Many (more than one) Half, also one-sided Tricuspid Quadriplegic Septuplet Nonan Multicellular Hemianopsia Examples of Prefixes for Positions and Directions Prefix Anterior

Posterior Eversion Lateral Bilateral Definition Situated at or directed toward the front; opposite of posterior Directed toward or situated at the back; opposite of anterior A turning inside out; a turning outward Midline of the body; pertaining to the side Having two sides; pertaining to the side Examples of Prefixes for Positions and Directions

Prefix Lithotomy Oblique Proximal Definition Position in which the patient lies on his or her back, legs flexed on the thighs, thighs flexed on the abdomen and abducted Slanting; incline Toward the center or median line; the point of attachment or origin Units of Weight and Measurement Apothecaries weight: System used for measuring

and weighing drugs and solutions, precious metals, and precious stones. Fractions are used to designate amounts (i.e. iss = one and one-half). Avoirdupois weight: The system of measuring and weighing used in English- speaking countries for all commodities except drugs, precious stones, and precious metals (i.e. pound = lb). Metric System: A system of weighing and measuring based on meter and having all units based on the power of ten. Some Common Weights and Measures Measure 3 tsp 2T 4T 8T

16 T 2c 4c 4 qt Equivalent 1T 1 ox c c 1c 1 pt 1 qt 1 gal Measure 1 fl oz.

c 1c 1 lb 1g 1 tsp 1c 1 qt Equivalent 30 g 120 g 240 g 454 g 1 ml 5 ml 240 ml 960 ml

Confusing Medical Terminology salping/o Versus salping/o salping/o = uterine (fallopian) tube, e.g., salpingitis (sal-pin-gi-tis) refers to inflammation of the fallopian tube salping/o = auditory (Eustachian) tube, e.g., salpingitis (sal-pin-ji-tis) refers to inflammation of the Eustachian tube Confusing Medical Terminology -tropia Versus -tropin -tropia = turning, e.g., anatropia (an-ah-trope-ah) refers to upward deviation of the visual axis of one eye when the other eye is fixed. -tropin = an affinity for, stimulating, e.g., thyrotropin (thi-rot-rah-pin), a thyroidstimulating hormone; a hormone of the

anterior pituitary gland having an affinity for and specifically stimulating the thyroid gland Confusing Medical Terminology bi- Versus bi/o bi- = two, twice, double, e.g., bicuspid (bikus-pid) refers to the valve that is situated between the left atrium and the left ventricle of the heart bi/o or bio- = life, pertaining to life, e.g., biology refers to the study of life

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