The knee is a crucial joint in the human body that connects the thigh bone, or femur, to the shin bone, known as the tibia. It allows for bending and straightening of the leg, making activities like walking, running, and jumping possible. The knee is supported by ligaments, tendons, and cartilage, which help stabilize the joint and absorb shock. Injuries to the knee, such as ACL tears or meniscus injuries, are common, especially in sports. Proper care, including rest and physical therapy, is essential for recovery. Keeping the knee strong and flexible can help prevent injuries and maintain mobility throughout life.