Skeletal system

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by TorresGC20
Last updated 4 years ago

Human Anatomy

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Skeletal system

What is it?

The skeletal system is made up of bones and joints. It does many things for your body like, supports it, helps you move, stores materials, protects organs, and produces blood cells.

The Skeletal System

Relations to other systems

It is mainly related to the muscle system because they pull on the bones to move the body. It is also related to the heart because it creates blood cells. It can also be related to many of your internal organs because it protects them.

When you are a baby you have about 275 bones, but as you grow older your bones fuse together.

5 fun facts

The word "skeleton" comes from the Greek word meaning "a dried body"

The femur is the longest bone in your body

When you break a bone the bone can grow back even stronger than before

Your bones are living!

Osteoporosis is a condition that causes the bones to become weak and brittle. When people get older their bones can lose minerals, which can cause this condition. You can prevent osteoporosis by exercising and having a diet with a suffient amout of calcium.

Bones and joints

Your bones are made of four main parts, outer membrane, compact bone, spongy bone, and bone marrow. The outer membrane is thin, but tough and covers the whole bone. It allows blood vessels and nerves to enter and leave the bone. Compact bone is underneath the membrane. It is not solid and has small canals that run through it. The canals take blood vessels and nerves form the outside of the bone, and carries them to cells inside the bone. Spongy bone is under the compact bone and at the end of the bone. It is exactly like the name says, sponge! It has small holes all over it and is light, but is very strong. In the rest of the space of the bone a connective tissue called marrow resides. The two kinds of marrow are red and yellow. Red marrow creates most of your red blood cells. Yellow marrow stores fat that is used as an energy reserve. Bones are special in that they are lightweight, but very strong. Your bones are living and grow with you. Joints are a place that two bones connect. Joints allow your bones to move in different ways. There are two kinds of joints, immovable and movable. Immovable joints just connect two bones, but allow little to no movement. Your skull is an example of immovable joints. Movable joints connect your bones and allow them to move. Your joints are made of connective tissues called ligaments and cartilage. There are four types of movable joints, hinge, ball-and-socket, pivot, and gliding.



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