Snakeknee observes, sketches its (her? his?) findings and asks. Can you answer the questions?

Snakes are elongate, legless, carnivorous reptiles of the suborder serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears.

The knee joint joins the thigh with the leg and consists of two articulations: one between the femur and tibia, and one between the femur and patella.