An infant skeleton has 350 bones, and some of these bones fuse.

So, a normal adult human has 206 bones.

Did you know that half of these 206 bones are present in the hands and feet?

The skeletal system is one of the important human body systems. Given above were some interesting facts above the human skeletal system.

Now, let us study it in detail.

The skeletal system is one of the important human body systems.

I have divided the human skeletal system, into 4 sections for better understanding, so let us go from top to bottom and study the human skeleton.

Skeletal System Diagram

Skeleton Diagram

Bone Structure of the Head

The head consists of many bones, mainly the cranium, jaw bones (maxilla and mandible) and the facial bones.

There are many bones which comprise the skeletal system and one of the important one is the cranium, which is commonly called skull. It protects the brain from any accidents or injury, it acts like a framework of the head.

The mandible is the strongest among the bones of the head.

Bone Structure of the Chest and Hip
chest and hip

The bones shown in the chest and hip region in the labeled human skeleton diagram are the ribs, vertebrae, pelvis, OS coxae, sacrum and coccyx.

Total there are 12 pairs of ribs, as you can see in the diagram. The last pair of the ribs, which is at the bottom of the rib, are called floating ribs, as they are not attached to the sternum.

The ribs are arranged in a cage-like structure which protects vital organs like the heart and lungs. In the back area, the bones that protect the spinal column are called vertebrae.

They help to protect the spinal cord in the body. Pelvis is a Latin word, which means 'basin', it is also known as hip girdle. The primary function of the pelvis is to bear the weight of the upper body.

Bone Structure of the Hand

There are around 7 major bones from the shoulder to the palms.

They are scapula, humerus, radius, ulna, carpels, metacarpals, and phalanges.

The scapulae is the triangular, wing-shaped bones, which are located on the shoulders.

Humerus is located in the upper arm.

The radius and ulna together constitute the forearm.

Carpals are the bones which form wrist.

These are attached to metacarpals which are joined to phalanges.

Bone Structure of the Leg

The bone structure in the leg is easy to memorize and draw, as it consists mainly of 6 bones.

These bones are femur, patella, tibia, fibula, tarsals, and metatarsals.

Femur is the longest and heaviest bone in the body, and helps to support the weight of the body.

Patella is located in front of the knee-joint, and commonly called the kneecap. It helps to cover and protect the knee-joint.

Fibula and tibia bones are located in the calves of the legs.

The foot bones shown in the labeled diagram of skeletal system, are the tarsals and the metatarsals.

There are seven tarsal bones, which are followed by metatarsals which are then followed by phalanges or toe bones.

Memorizing the Bone Names
It can be a bit difficult to remember all the scientific names of bones, but here is my secret technique of remembering the names.
  • First, divide the labeled diagram of skeleton in 4 sections, like above, which are head, arms, chest + hips and the fourth one - legs.
  • So, for the head remember J, F and C, which are for Jaw bones, Facial bones and Cranium.
  • For legs remember the letters F, P, T, F, T and M and memorize the order, these letters stand for Femur, Patella, Tibia, Fibula, Tarsals and Metatarsals.
  • In a similar manner use the method, for chest + hips section and hands section.
This method works great for me, I hope this method also helps you to memorize the labeled human skeleton diagram.

Unlabeled Skeleton Diagram
For practice, you can print the blank skeleton diagram illustrated below.

Printable skeleton diagram - Print to Label

Fun Facts About Skeleton
Given above were the tips on memorizing the various parts of the skeleton. Here are some interesting facts about skeleton.

Skeleton Bullet Among the 206 bone in the human skeletal system, 52 are found in our feet!

Skeleton Bullet Bones are made of hard stuff which makes them strong, however, bones also have many living cells that help in their growth and repair.

Skeleton Bullet Did you know that the smallest bone in the human body is located in the ear? The size of the smallest bone called stirrup, is the size of a grain of rice.

Skeleton Bullet Bones are filled with bone marrow, which is a fatty substance.

Skeleton Bullet To keep the bones strong, one should exercise regularly.

Skeleton Bullet In adults, the bones contribute to 14% of the total body weight.

Skeleton Bullet Did you know that one person out of 20 has an extra rib? Strange, right?!

Skeleton Bullet The cartilage disintegrates faster than the bone, hence you will observe absence of nose or ears in the skeleton.

Skeleton Bullet Also, babies don't have kneecaps. Technically, they do have kneecaps but they are soft cartilage and yet to harden into bones.

Skeleton Bullet Giraffes and humans both have 7 bones in their neck, however the vertebrae present in the giraffe's neck are way longer!

Skeleton Bullet Bones are stronger than concrete and steel, still doctors can be seen fixing fractures year-round!

Skeletal System Quiz
Type the correct answer in the box and click on check to see if your answer is right.

Q.1 - How many bones are present in a normal adult human?
  • 160
  • 206
  • 260

Q.2 - Which bone protects the brain
  • Cranium
  • Cerebrum
  • Clavicle

Q.3 - Which is the longest bone in the human body?
  • Tibia
  • Humerus
  • Femur

Q.4 - Which is the smallest bone in the human body?
  • Stirrup
  • Vertebrae
  • Patella

Q.5 - How many pairs of ribs do we have?
  • 16
  • 12
  • 14

There is a little difference between the male and female skeleton, but mostly they look similar. The female skeleton is slightly smaller and less robust. The female skeleton also has a wider pelvis, compared to the male skeletal system. So study the above diagram, and for memorizing, draw it a few times and keep labeling!