A function of the testes is to: make estrogen, produce sperm, deliver sperm to the outside of the body, add fluid to sperm produce sperm When a sperm joins with an egg, it is called: fertilization, premenstrual syndrome, ejaculation, ovulation
A hygrometer is weather instrument used to measure the amount of humidity in the atmosphere. There are two main types of hygrometers â a dry and wet bulb psychrometer and a mechanical hygrometer. Humidity is the amount of water vapor in the atmosphere caused by condensation and evaporation.
Inexpensive and relatively immune to contamination, these hygrometers have fibers that connect with dials and cause displacements of needles or gauges as they expand or contract. These meters are useful for measuring general humidity in homes, instrument cases, terrariums, basements and attics.