Exploring Body Systems and Muscles

What is the primary function of the integumentary system?

• Digestion

• Protection

• Respiration

• Circulation

Which of the following is a major bone in the human body?

• Femur

• Bicep

• Trapezius

• Aorta

What type of muscle is the heart primarily made of?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

• Voluntary muscle

Which component is NOT part of the circulatory system?

• Heart

• Lungs

• Blood vessels

• Blood

What is the first step in the muscle contraction process?

• Muscle relaxation

• Nerve signal reaches the muscle

• Blood flow increases

• Muscle fibers break down

Which of the following is a function of the skin?

• Producing red blood cells

• Protecting against UV radiation

• Storing calcium

• Filtering waste

What is the largest bone in the human body?

• Tibia

• Humerus

• Femur

• Radius

Which type of muscle is responsible for moving the skeleton?

• Cardiac muscle

• Smooth muscle

• Skeletal muscle

• Involuntary muscle

What is the main function of red blood cells in the circulatory system?

• Fight infections

• Carry oxygen

• Clot blood

• Produce hormones

Which mineral is essential for muscle contraction?

• Iron

• Calcium

• Sodium

• Potassium