Positions are two of the most common type of unsafe postures that place a person at risk for injury

True or false a fertilized cell divides many times to form an embryo

By 2 weeks after fertilization the morula has implanted into the uterine lining and transforms into a(n) . this time is when the , or the organ that will provide nourishment to the fetus by exchanging nutrients and waste products, begins to develop.

What is the medical term for the middle ear not being able to conduct sound vibrations to the inner ear