| A | B |
|---|
| Axial skeleton | The portion of the skeleton that supports and protects the head, neck, and trunk |
| Appendicular skeleton | The portion of the skeleton that attaches to the axial skeleton and has the limbs attached to it |
| The human superstructure is made up of | the skeleton, the muscles, and the skin. |
| Smooth Muscles | Control the movements necessary for your body's internal organs and blood vessels to function |
| Cardiac muscle | The heart. It is an involuntary muscle. |
| Keratinization | Is a process that hardens living cells. It is used to make the outer layer of the epidermis, as well as hair and nails. Remember, keratinization kills cells. |
| Bones | Are made up of collagen and minerals. The collagen makes the bones flexible, while the minerals make them hard and strong. |
| Red bone marrow | Produces blood cells |
| Compact bone tissue | Is packed together tightly. Spongy bone tissue is lighter than compact bone tissue. |
| Spongy bone tissue | Has lots of space in between its fibers |
| Are bones alive? | Bones are alive. There are living cells imbedded in the bone. Thus, bone tissue is living tissue. That’s why it can grow! |
| Are your arms part of the appendicular skeleton or the axial skeleton? What about your neck? | According to their definitions, the arms belong to the appendicular skeleton, but the neck is a part of the axial skeleton. See Figure 11.2. |
| How do skeletal muscles attach to the skeleton? | Ligaments hold the bones of the joints together. Cartilage cushions the bones of the joints so that they do not rub painfully against each other. |
| Medullary cavity | This cavity, which runs along the length of a long bones center, contains one marrow and blood vessels. |
| Pectoral girdle | A person's upper limbs are connected to the axial skeleton by the pectoral girdle. |
| Arm Bone | Humerus |
| Forearm bones | Radius, ulna |
| Thigh bone | Femur |
| Cartilage | Substances that is not as firm as bone, but it is more flexible. It holds the vertebral column together, attaches the ribs to the sternum and attaches the two coxae to one another |
