Question

Mention any four bones of the lower limb of human beings.

Answer 1

Hint: Lower limbs of human beings include legs. The legs are made up of 30 bones in total. The foot alone contains 26 bones.

Complete answer:
The four bones present on the lower limb are-
-Femur is the largest bone present in the lower limb. It is commonly called the thigh bone. It is joined to the hip bone by ball and socket joint. The femur is long, curved and robust bone. It can resist the compression forces of 800-1100kg.
-Tibia is the main bone of the leg (lower). It forms shin. It is the second largest bone in the body and it is essential for body weight bearing. The top part of the tibia connects to the knee joint whereas the lower part is connected to the ankle joint. Tibia can be divided into – proximal, shaft and distal parts.
-Fibula is the bone present on the lower leg part. It lies parallel to the tibia. It does not help in the weight bearing but helps in the muscle attachment. It also provides stability to the ankle joint. It is divided into three parts- proximal, shaft and distal.
-Tarsals are the combination of seven bones present in the foot along with metatarsals and phalanges. Tarsals are located in the ankle region of the foot. Bones in tarsals can be divided into proximal, intermediate and distal groups. Calcaneus is the largest tarsal bone present.

Note: The lower limb bones consist of femur, patella, tibia, fibula, tarsals, metatarsals and phalanges. Tarsals consist of seven bones, metatarsal consist of five bones each for one digit, and phalanges consist of bones of toes. Metatarsal connects tarsal and phalanges.