HUMAN NUTRITION

Detailed explanation-1: -The two main groups of muscles are: The quadriceps femoris on the front side of the thigh: It’s also known as the quadriceps extensor (quads) because it helps to extend the knee. The biceps femoris on the back of the thigh: Together with other muscles, it makes it possible to bend the knee.

Detailed explanation-2: -The knee is a hinge joint, situated between the thigh bone (femur) and shin bones (tibia and fibula). Contraction of the muscles on the front of the thigh (quadriceps) straightens the leg, while contraction of the muscles on the back of the thigh (the hamstrings) allows the leg to bend at the knee.

Detailed explanation-3: -Hamstrings What is this? The hamstrings are made up of three muscles in the back of the knee and thigh. They are the main knee flexor muscles and their primary role is to bend the knee.

Detailed explanation-4: -When you straighten your leg, the quadricep muscles pull on the quadricep tendon, this pulls the kneecap to make the knee extend. When you bend it, the hamstring muscles contract and pull the tibia backwards, causing the knee to flex.