Answer:
Internal: Heart, Lungs and Kidneys, Brain, Liver, Stomach, Intestines, Pancreas.
External: Skin, Ears, Eyes, Nose, Mouth ect.
Explanation:
External body parts are the ones that are on the outside of your body that are visible to people around you, and can also be seen by yourself. Skin is the biggest organ of your body.
Internal body parts are the are the parts that are not visible to because it is inside of you, and are mostly organs
The small intestine has small hair like structures called villi, which collect nutrients.
The answer is osteoporosis -
osteoporosis is a disease where bones lose density and become more brittle and prone to breaking
