1. The skeletal system is responsible for six functions in the human body and they are endocrine regulation, movement, production of blood cells, protection, storage of minerals and support.
2. All the bones in the human skeletal system are connected to another bone, except for one, the hyoid bone. The hyoid bone is located at the base of your tongue and connected only by ligaments and muscles.
3. There are two different types of bones in the human skeletal system, cortical bones and trabecular bones.

1. Osteoporosis is the main disease that can affect our bones. It is estimated that 200 million people suffer from it and, most alarmingly, there is no cure, only prevention.
2. Human bones are about 4 times stronger than concrete.
3. The bone regeneration capacity is so high that it is defined as a mechanism in constant work. So every 7 years we have a completely new bone in our body.

1. The skeleton of a newborn baby has approximately 300 different components, which are a mixture of bones and cartilage.
2. The only bone in the human body not connected to another is the hyoid, a V-shaped bone located at the base of the tongue.
3. The stapes, in the middle ear, is the smallest and lightest bone of the human skeleton.

1.  Harder than steel

• Our bones can be defined by being endowed with great lightness. However, this part of our body can be up to 5 times harder than steel itself. In other words, even the smallest bone can surprise you if you look at the doses of hardness.

• It should be noted that the vast majority of bones are found in the hands and feet. Specifically, more than half of the bones of our body, since each hand incorporates a total of 27 bones, while each foot is capable of integrating about 26 complete bones. That is, a total of 106 bones between the four limbs.

• Our body is impressive. The bone regeneration capacity is so high that it is defined as a mechanism in constant work. That yes, the reconstruction is slow, although not for that less effective. As data we can add that every 7 years we have a completely new bone in our body.

1. The arteries penetrate the bones through the periosteum, to irrigate and nourish the bone; therefore, if the bone is removed it dies. A nutrient artery traverses obliquely through compact bone to supply cancellous bone and bone marrow. The ends of the bones are nourished by the metaphyseal and epiphyseal arteries.
2. The stirrup or stapedius is the smallest and lightest bone in the body; It belongs to the chain of ossicles of the middle ear, which is located in the tympanic box and is responsible for conducting the pressure of sound waves to the inner ear where they are transformed into nerve impulses.
3. Bones are derived from mesenchyme (embryonic connective tissue) by two different processes: intramembranous ossification and endochondral ossification.

• Bones can be classified into 5 types: short bones, long bones, irregular shaped bones, sesamoid bone and flat bone. Some Bones produce red blood cells. 
• The skeleton is intimately connected with the muscular system, also integrates functionally with the cardiovascular system. 
• This flexible inner framework supports all other parst and tissues, wich would collapse without skeletal reinforcement

1. At death, cartilage decomposes more rapidly than bone. Hence, skeletal skulls have no nose or ears.
2. In general, the bones of the human body are quite light. However, they are very, very strong: 5 times stronger than steel. 
3. Surprisingly, the long neck that characterizes giraffes has exactly the same number of bones as that of humans. Both species have 7 vertebrae that support our skull and the facial bones that make up the face below.

• Male bones are bigger and stronger, in both size and density. Peak male bone mass is around 50% more than women’s, and women lose bone faster as we age. Black people have significantly stronger bones than whites: black women’s peak bone mass is the same as white men’s. 
• Women have a longer torso. Our skeleton accommodates extra reproductive organs and finds space to push things out of the way during pregnancy. It makes our legs shorter than men’s. 
• The skulls of woman are 10% thicker, but man tend to have a bony ridge at the brow line and a heavier jaw. The forehead of man tends to slope backward; that of woman is more vertical.

• At death, cartilage breaks down faster than bone. Hence the skulls of the skeletons have no nose or ears. 
• Our bones can be defined by being endowed with great lightness. However, this part of our body can be up to 5 times harder than steel itself. 
• Surprisingly, the long neck that characterizes giraffes has exactly the same number of bones as that of humans. Both species have 7 vertebrae that support our skull and the facial bones that make up the face below.

• Some parts of the body have more bones than others, the best example being the hands and feet. In each hand there are a total of 27 bones, while in each foot there are 26 bones. Together, the 4 have 106 bones.
• Your teeth are not considered part of the skeleton; Although your teeth are considered bones, they are not part of the 206 skeleton, but are counted separately, assuming a total of 20 milk teeth and between 28 to 32 permanent teeth.
• The human body has 12 pairs of ribs, that is, a total of 24 in total. However, 1 in 500 people develops 1 more rib. Rib 25 is often called the cervical rib and can cause a variety of health problems.

1. The bones of the appendicular skeleton (the limbs and girdles) are attached as appendages to the axial skeleton.
2. Babies have more bones: when a baby is born, its skeleton may contain more than 300 bones, but as they grow some of them fuse together, giving way to the figure of 206 bones.
3. 24 ribs... almost always: 1 in 500 births there may be a 25th rib, called the cervical rib.

1. Human bones can be classified according to their shape: long (humerus), short (trapezoid), flat (sternum), irregular (vertebrae) and sesamoid (patella).

2. The lower jaw bone (mandible) is the largest and strongest bone in the face. It is the only movable bone in the head.

3. The macrophages of the skeletal system are the osteoclasts, and they are responsible for bone remodeling of the bones of the human body.

• Most people have 12 ribs, but some have 13: A 13th rib is rare — only 1 percent of people are born with it. In most people, this extra rib, called a cervical rib, can cause medical issues like neck pain. For that reason, people born with this extra rib often have it removed.
• Bones are strong, but teeth are stronger: The enamel on your teeth, which are considered part of your skeletal system, is actually stronger than bones. Enamel protects the delicate nerves and tissue inside your teeth. Inch for inch, your teeth can take more wear and tear than any of your other bones.

• One bone isn’t connected to any other bones: The hyoid bone, which is in your throat, is the only bone that doesn’t connect to a joint. The hyoid is responsible for holding your tongue in place.

1. The largest bone is the pelvis or hip bone. In fact, it is made up of six bones joined together.
2.The longest bone is the femur, in the thigh. It constitutes almost a quarter of the total height of the body.
3.The smallest bone is the stirrup, located in the middle ear. It is slightly larger than a grain of rice.
4.The ears and the end of the nose have no bones inside. Its internal supports are cartilage, which is lighter and more flexible than bone. This is why the nose and ears can bend