References- Books

PRINCIPLES OF ANATOMY AND PHYSIOLOGY

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Functions of bone and the skeletal system

Bone tissue makes up about 18% of the weight of the human body. The skeletal system performs several basic functions:

1. Support: The skeleton serves as the structural framework for the body by supporting soft tissues and providing attachment points for the tendons of most skeletal muscles.
2. Protection: The skeleton protects the most important internal organs from injury. For example, cranial bones protect the brain, vertebrae (backbones) protect the spinal cord, and the rib cage protects the heart and lungs. 
3. Assistance in movement: Most skeletal muscles attach to bones; when they contract, they pull on bones to produce movement.
4. Mineral homeostasis (storage and release): Bone tissue stores several minerals, especially calcium and phosphorus, which contribute to the strength of bone. Bone tissue stores about 99% of the body’s calcium. On demand, bone releases minerals into the blood to maintain critical mineral balances (homeostasis) and to distribute the minerals to other parts of the body. 
5. Blood cell production: Within certain bones, a connective tissue called red bone marrow produces red blood cells, white blood cells, and platelets, a process called hemopoiesis. Red bone marrow consists of developing blood cells, adipocytes, fibroblasts, and macrophages within a network of reticular fibres. It is present in developing bones, ribs, breastbone, vertebrae, skull, and ends of the bones of the arm and thigh.
6. Triglyceride storage: Yellow bone marrow consists mainly of adipose cells, which store triglycerides. The stored triglycerides are potential chemical energy reserve. In a newborn, all bone marrow is red and is involved in hemopoiesis. With increasing age, much of the bone marrow changes from red to yellow. 

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Joints

Joints are classified structurally, based on their anatomical characteristics, and functionally, based on the type of movement they permit. The structural classification of joints is based on two criteria: (1) The presence or absence of a space between the articulating bones, called a synovial cavity, and (2) The type of connective tissue that binds the bones together. Structurally, joints are classified as one of the following types:

Fibrous Joints: There is no synovial cavity, and the bones are held together by dense irregular connective tissue that is rich in collagen fibers. 

Cartilaginous Joints: There is no synovial cavity and the bones are held together by cartilage. 

Synovial Joints: The bones forming the joint have a synovial cavity and are united by the dense irregular connective tissue of an articular capsule, and often by accessory ligaments.

The functional classification of joints relates to the degree of movement they permit. Functionally, joints are classified as one of the following types:

Synarthrosis: An immovable joint. The plural is synarthroses.

Amphiarthrosis: A slightly movable joint. The plural is amphiarthroses.

Diarthrosis: A freely movable joint. The plural is a diarthroses. All diarthroses are synovial joints. They have a variety of shapes and permit several different types of movements. 

Looking at this gives me the right information I need for Ian's leaflets or posters, to show the right information explaining the joints and bones.