Explanation: The human skeleton is made up of bones, these bones are composed of a mineral called calcium. Due to this mineral bone is a very hard substance, without the presence of calcium bone becomes soft and rubber like. There are two types of bone which are spongy and compact, spongy bone has lots of small spaces that are filled with marrow, this type of bone is found at the ends of long bones such as the femur. Compact bone is very densely compacted bone, this makes up the main shaft of the bones, this dense compaction is what gives them strength. Bone has different structures, these include the diaphysis which is the main shaft of the bone, the epiphysis which is the extremities of the bone, the articular cartilage which forms a joint and is a thin layer of cartilage which covers the epiphysis of the bone. The periosteum is the tough fibrous coating that covers that contains nerves, blood vessels and lymph vessels that go into the bone, they also act as a point of attachment for ligaments and tendons. The marrow cavity is the space in between the bone which contains either yellow or red bone marrow, yellow bone marrow produces white blood cells whereas red blood marrow produces red blood cells. The skeletal
‘ He is strong and confident even in times of trouble ‘
Explanation:
It can’t be any of the other ones, because He is being strong and telling the man to sit up straight to look more confident. Also this would be the only one that makes sense ( My opinion. ) Hope this helped! :D
