Human Body Healing and Structure

The video explains why bones heal faster than ligaments due to their active remodeling process and better blood supply. Bones constantly rebuild themselves, replacing 20% of the skeleton annually, and perform functions like blood cell production and nutrient storage. Ligaments, however, lack a direct blood supply, relying on nearby tissues for nutrients, which slows their healing. The video also compares healing rates of different tissues, noting that muscles heal quickly due to abundant blood, while the cornea, despite no direct blood supply, heals fast due to nutrient-rich fluid.

Why might a broken bone heal faster than a sprained ligament?

• Bones are less dense than ligaments.

• Ligaments are more complex structures.

• Bones have a better blood supply than ligaments.

• Ligaments are more exposed to external factors.

What percentage of your skeleton is replaced each year through remodeling?

• 40%

• 30%

• 20%

• 10%

Besides providing structure, what is another function of bones?

• Filtering toxins

• Regulating body temperature

• Generating new blood cells

• Producing hormones

How long does it typically take for a bone fracture to heal?

• About 3 weeks

• About 6 weeks

• About 12 weeks

• About 10 weeks

Why do ligaments take longer to heal compared to bones?

• They are more complex structures.

• They have a limited blood supply.

• They are constantly in use.

• They are more prone to infections.

What is the primary job of ligaments in the body?

• Generating energy

• Storing minerals

• Holding the body together

• Producing blood cells

Which tissue in the body heals the fastest despite having no direct blood supply?

• Cartilage

• Ligaments

• Muscles

• Cornea

What is the general rule of thumb regarding blood supply and healing?

• Better blood supply equals faster healing.

• Blood supply has no effect on healing.

• Less blood supply equals faster healing.

• More blood supply equals slower healing.

Which tissue is known for super-slow healing due to minimal blood access?

• Skin

• Cartilage

• Nerves

• Muscles

What role does the fluid behind the cornea play in its healing process?

• It provides structural support.

• It supplies nutrients and resources.

• It filters out impurities.

• It regulates temperature.