Osteoporosis is basically a severe loss of bone density.
Osteoporosis is a disease that increases bone weakness, and increases the risk of a broken bone.
Bone
Osteoporosis affects the Skeletal System. But the Skeletal System relies, in part, on the Digestive System and what is eaten along with the Endrocrine System which controls how the body regulates and uses minerals, hormones, etc.
skeletal system
Every body system is affected by every other body system.
The system in the human body that is affected when on steroids is usually the whole body but mainly the heart
The endocrine system would be affected which, in turn, affects just about every other body system.
The Lymphatic System
The integumentary system
The cardiovascular system.
the bones and joints
Easy. The immune system
The heart and circulatory system.