the human skeletal system consists of different types of bones in fact the adult human skeletal system consist typically of 206 different bones and all these different types of bones can be categorized into five groups and that means the human skeletal system only contains five different types of bones so let's discuss what these five different groups are what these five different types of bones are let's discuss their function and then let's take look at the following diagram and let's place some of these bones into their correct group so let's begin with the long bone the long bone is called the long bone because they are much longer than they are wide and the long bone consist of three different sections we have our epis the metas and we have our diis now the epis contains our spong bone also known can bone and this contains our red bone marrow that synes red blood cells now the met consist of an important section known as our epal plate and and this epal plate is responsible for lengthening and ela the long bone as the organism as the human actually grows now our di is the long shaft the long curved shaft that contains our compa basic responsible giv our b strong basic our long bones are capable of resisting very high tensile and compress forces and that's exactly why these bones are responsible for supporting our body in fact the long b support the majority of the body weight we have many different types of long bones in our take look at following diagram so we have the clal also known as the collar bone so this bone here and this bone here this is our example of a long bone now in the arm we have the humerus the bone here and we have the two bones here our radius and the alna these are examples of long bones now if we examine our legs the legs also contain long bones so we have the fem which is the bone that much stronger than concrete we also have the tibia and our fibula and these are also examples of long bones now if we examine our fingers the fingers specifically the met carps are also examples of long bones but these are much smaller than these long bones so basically long bones can actually be very long or they can be very small so basically what the defining what the definition of long bone is much longer they are wider now let's take a look at second type of bone know as our short bone so by definition short bone has the shape of a cube and that basically means they are as long as they are wide now they basically function by providing support as well as stability to other bones and short bones do not actually move themselves now ex of short bones if we examine our wrist the wrist contains bones known as the carp and these are examples of short bones now if we examine the ankles of our body these contain the tss which are also examples of short bones now let's move on to our flat bones so flat bones are those bones that are relatively thin and which contain a relatively high surface area now these bones can serve two important functions they can either protect our internal organs and our tissues and they can also serve as attachment points for muscles because of their high surface area so they contain compact bone on the surface and in the middle at the center they contain sponge bone so what are some examples of flat bones so the skull the cranium is an example of flat bones so we have many of these flat bones that essentially fuse together as the organism becomes an adult as the organism grows and the skull these flat bones basically serve the purpose of protecting our brain our internal organ now other examples of flat bones is the rib cage as well as our stern and this acts not only as attachment points for muscles but they also basically act to protect the heart the lungs as well as vas tiss in reg here now other examples flat bones is our scapa so this is the shoulder blade bone this bone and this bone here as well as the pelvis which is the bone of the hip these are examples of flat bone they have relatively large surface area and they are relatively flat relatively thin now let move on to our regular b so basically these are the bones that have a certain unique shape that we cannot actually label as long bones short bones or flat bones so these bones have unique shapes that help them carry out certain types of unique function so typically our irregular bones consist of b compact as well as sponge bon so they have spong bone at the center and compact bone usually on the surface and they function in protection as well as in support so one example of our irregular bone is our maxilla or our maxilla as well as the mand so these two bones have an irregular shape the maxilla is the upper jaw bone the mand the mand is our lower jaw bone and these function to basically allow us to eat and ingest our food that we need to actually survive another exle ir is basically our this is this bone here a third example are the verb so we have the cervical and the lar verb and these are basically responsible in protecting our spinal cord so these verb basically surround and protect our spinal c so the bones bones have unique shapes do not fit these categories and these shapes them serve their specific purpose so they have compact bone and sponge bone fun protection and support some examples include our sacrum the mand the maxilla and our verb now the final type of bone we're going to examine is a sesamo bone so all humans typically contain one sesamo bone and that's basically p by defines bone is a that is in the shape of a sesame seed and these sesamo bones or sesamo bone basically grows on our tendon so basically the pat is found on the tendon found in this region now as as the organism grows as the person grows we can basically grow other types of bones that and b devel usually as some type consistent physical stress or physical frictions