Why Don't Sleeping Bats Fall Down?

The video explores how different animals, particularly bats, have unique sleeping habits. Bats can hang upside down for extended periods due to a special mechanism in their feet that doesn't rely on muscle strength. This mechanism involves tendons with saw-like teeth that lock into place, allowing bats to hang passively. The video also compares this mechanism to those of birds and certain mice, highlighting the advantages of hanging upside down, such as avoiding predators and easy takeoff.

Describe the structure and function of the special tendons in bats.

What is the significance of the passive digital lock in bats?