Skeletal system

Question 1

What are the functions of the skeleton

Answer 1

• Support
• Protection (e.g the ribcage protects the heart and lungs)
• Movement (muscles attached to the bone which contracxt to move the bones)
• Mineral storage ( Ca and P)
• Production of blood cells

Question 2

Decscribe the structure of the bone.

Answer 2

• Joint: The place where two or more bones meet
• Cartilage: the layer of soft tissue between joints. It is softer than the bones and reduces friction when the bones meet.
• Spongy bone: Only occurs in long bones and is responsible for red blood cell production.
• Medullary cavity(marrow cavity):This contains yellow marrow, which produces white blood cells
• Compact bone(outer layer): This is white in appeareanc eand hard

Question 3

What are the functions of connectivce tissue?

Answer 3

• Support
• Protection
• Store fat
• Form blood cells
• Bind structures

Question 4

What is loose connnective tissue

Answer 4

Lose connective tissue surrounds the organs. It allows the organs to expand but also protects the organs

Question 5

What is adipose tissue?

Answer 5

It is a loose connective type of tissue thart stores fat and insulates. It is found under the skin and around the kidneys

Question 6

Wht are tendons?

Answer 6

Tendons are inelastic fibres of clloagen that connect bone to muscle.

Question 7

What are ligaments?

Answer 7

Ligaments are connective tissue that consist of fibres of collagen and attach two bones to a joint. They are slightly elastic, allowing the bone to move, while limiting the range of the movements of the joints.

Question 8

What is muscluar tissue?

Answer 8

Muscle accounts for 40% of a bodies weight. When musscles contract movemenet occurs e.g bones connected to them via tendons move.

Question 9

Describe types of muscle

Answer 9

• Skeletal muscle: This is voluntary muscle found connected to bones, and between the ribs and in the diaphragm. Voluntary muslce is under conscious control. It’s main functions are movement and breathing
• Smooth Muscle: Ths is involuntary muscle found in the internal organs. Involantary muscle move independently. It’s main functions include peristalis and the dilation of the cervis during birth
• Cardiac muscle: Found the heart. Involuntary muscle tha does not fatigue. It’s function is to pump blood around the body