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Bones and Facts For Kids About The Skeletal System

The human skeleton consists of both fused and individual bones supported and supplemented by ligaments, tendons, muscles and cartilage. How many bones are in the human body? A baby has more than 300 bones, but a full grown adult only has about 206. This is because as we grow some of the bones in our body fuse together. Anatomical variation may also result in the formation of more or fewer bones. It serves as a scaffold which supports organs, anchors muscles, and protects organs such as the brain, lungs and heart. The biggest bone in the body is the femur in the thigh, and the smallest is the stapes bone in the middle ear. In an adult, the skeleton comprises around 30-40% of the total body weight.

Why Do Bodies Need Bones?

Bones provide a strong framework that supports the rest of the body. Without bones, you would flop on the floor like an octopus. Some of the bones form a suit of internal armor, which protects the brain, lunches, heart, and other vital organs. All the bones together are called the skeleton. You can move and bend different parts of the body because the bonesmeet at joints.

What Are Ligaments?

They are strong bendy straps that hold together the bones of a joint. early all the bodies joints have several ligaments.

What Is A Vertebra?

A vertebra is a knobby bone in your spine. The 33 vertebrae fit together to make a strong pillar, the spine, which carries much of your weight. At the same time the vertebrae allow your back to bend and twist.

What Is A Joint?

Where two bones meet, their ends are shaped to make different kinds of joints. There are 4 types of joints that are in the human body that help us move. The 4 types of joints are; hinge joint(found in the knee and elbow), ball and socket joint (found in the shoulder and hip), pivot joint (found in the neck), and a saddle joint (found in the thumb). Each kind of joint makes a strong connection and allows a particular kind of movement. For example, the knee is a hinge joint that lets the lower leg move only backward and forward. The hip is a ball and socket joint that allows you to move your thigh around in a circle. The saddle joint at the base of the thumb also gives the thumb a wide range of movement for gripping objects.

Why Do Joints Not Squeak?

Joints are cushioned by soft cartilage. Many joints also contain synovial fluid which works something like oil to keep them lubricated and moving smoothly.

Which Is The Longest Bone In The Body?

The thigh bone in the upper part of the leg is the largest bone in the body. It accounts for more than a quarter of a persons height.

What Is The Smallest Bone In The Body?

The smallest bone is called the stirrup. Its about the size of a grain of rice and is located deep inside the ear. Its job is to pass on sounds from the outer and middle ear to the inner ear for processing by the brain.

Which Joins Move Least?

Your skull is made up of more than 20 bones fused together in joints that allow no movement. These type of joins are fused as you grow from an infant and are called suture joints.

Which Joint Movies The Most?

The shoulder joint is the ball and socket joint that allows the most movement and is used the most in the body. Excessive use of this joint can cause shoulder problems.

What Is Inside Of A Bone?

Inside a bone is the crisscross honeycomb of lighter bone. Blood vessels weave in and out of the bone keeping the cells alive. Bones are made of red marrow jelly, blood vessels, softer spongy bone, outer compact bone, and some bones contain bone marrow at the center.

List Of Bones In The Human Body

Cranial bones (8 bones):

frontal bone
parietal bone (2 bones)
temporal bone (2 bones)
occipital bone
sphenoid bone
ethmoid bone

Facial bones (14 bones):

maxilla (2 bones)
palatine bone (2 bones)
zygomatic bone (2 bones)
nasal bone (2 bones)
lacrimal bone (2 bones)
inferior nasal conchae (2 bones)

In the middle ears (6 bones):

malleus (2 bones)
incus (2 bones)
stapes (2 bones)

In the throat (1 bones):

hyoid bone

In the shoulder girdle (4 bones):

scapula or shoulder blade (2 bones)
clavicle or collarbone (2 bones)

In the thorax (25 bones):

sternum (1 bones)
ribs (2 x 12 bones)

In the vertebral column (24 bones):

cervical vertebrae (7 bones)
thoracic vertebrae (12 bones)
lumbar vertebrae (5 bones)

In the arms (2 bones):

Humerus (2 bones)

In the forearms (4 bones):

radius (2 bones)
ulna (2 bones)

In the hands (54 bones):

Carpal (wrist bones) bones:
-scaphoid bone (2 bones)
-lunate bone (2 bones)
-triquetral bone (2 bones)
-pisiform bone (2 bones)
-trapezium (2 bones)
-trapezoid bone (2 bones)
-capitate bone (2 bones)
-hamate bone (2 bones)
Metacarpus (palm bones) bones:
-metacarpal bones (5 × 2 bones)

Digits of the hands (finger bones or phalanges bones):
-proximal phalanges (5 × 2 bones)
-intermediate phalanges (4 × 2 bones)
-distal phalanges (5 × 2 bones)

In the pelvis (4 bones):

hip bone(2 bones)

In the thighs (2 bones):

femur (2 bones)

In the legs (6 bones):

patella (2 bones)
tibia (2 bones)
fibula (2 bones)

In the feet (52 bones bones):

Tarsal (ankle bones) bones:
-calcaneus (heel bone bones) (2 bones)
-talus (2 bones)
-navicular bone (2 bones)
-medial cuneiform bone (2 bones)
-intermediate cuneiform bone (2 bones)
-lateral cuneiform bone (2 bones)
-cuboid bone (2 bones)

Metatarsus bones:
-metatarsal bone (5 × 2 bones)
Digits of the feet (toe bones or phalanges bones):
-proximal phalanges (5 × 2 bones)
-intermediate phalanges (4 × 2 bones)
-distal phalanges (5 × 2 bones)