Jonny tries to ride his bike a little longer each time. which principle of fitness is he following?

a).individuality

b). reversibility

c). progression

d). specificity

Brian is admitted to the hospital after a motor vehicle crash. during his stay at the hospital, physical therapists him with his recovery. this is care?

How do i know when i have a stress headache? what are the symptoms?

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.