Answer each question carefully. You can review your selections before submitting. You can also enable a timer to challenge yourself!
Q1:What type of muscle is found in the heart?
Q2:What connects muscles to bones?
Q3:What are alveoli responsible for?
Q4:Which part of the eye focuses light?
Q5:What part of the brain controls voluntary movement?
Q6:What are the smallest blood vessels called?
Q7:Which organ filters toxins from the blood?
Q8:What is the main function of the skeletal system?
Q9:Which body system fights off infections?
Q10:What is the primary function of the circulatory system?
Q11:How does oxygen enter the blood in the lungs?
Q12:Where are red and white blood cells produced?