Skeletal System II Exam Prep Quiz!

The human skeletal system consists of 206 bones (including the three tiny bones in each middle ear).

Calcium and phosphorous are minerals that give bones their strength. People must obtain these minerals from food. People who do not get enough of these minerals have brittle bones and they may become stooped when they grow old.

The skeletal system has multiple functions. It provides support to the body, giving it shape and structure. Additionally, it works in conjunction with the muscles to facilitate movement and locomotion. Therefore, the correct answer is "all of the above" as all the given options accurately describe the functions of the skeletal system.

Muscles are made up of many cell fibers joined together. These fibers can expand and contract, allowing the parts of the body to move.

Cartilage is a more flexible and softer material than bone. It serves as a protective, cushioning layer where bones come together -- preventing them from rubbing against one another. Cartilage also makes a firm but flexible framework for the ear and respiratory passages, ensuring that these openings do not collapse.

The skeletal system consists of bone, cartilage, ligaments, tendons, adipose, epithelia, and nerves. This is because the skeletal system is not just composed of bones, but also includes other connective tissues like cartilage, ligaments, and tendons. Adipose tissue is also present in the skeletal system, providing cushioning and insulation. Epithelial tissue lines the surfaces of bones and other structures within the skeletal system. Nerves are also a part of the skeletal system, allowing for communication and coordination between different parts of the body.

An ellipsoid joint does not have a flat articulating surface. Instead, it has an oval-shaped articulating surface that allows for a wide range of motions, including rotation. Therefore, the statement that an ellipsoid joint permits all motions except for rotation is incorrect.

The correct answer is that compact bone is matched correctly with lamellae and haversian systems, and chondrocytes are matched correctly with lacunae. Compact bone is composed of lamellae, which are concentric rings of mineralized matrix that surround the central haversian systems. Haversian systems are cylindrical structures that contain blood vessels, nerves, and bone cells. Chondrocytes are the cells found in cartilage, and they reside within small spaces called lacunae.

The type of bone that is only found in the sutures of fetal skulls is called "wormian". This term refers to small extra bones that can develop within the sutures of the skull. No other answer is correct because "wormian" specifically describes this unique type of bone found in fetal skulls.