Question

18 multiple choice 2 points
the heart is ______ to the breastbone.
anterior
proximal
inferior
posterior

19 true or false 2 points
immune cells that defend the body are called leukocytes.
true
false

20 true or false 2 points
anabolism is a type of metabolism where large, complex molecules are broken down into simpler ones, releasing energy in the process.
true
false

Explanation:

Anatomical relationship of the heart and breastbone

The breastbone (sternum) is located on the anterior (front) side of the thoracic cavity, while the heart lies behind it. Therefore, the heart is posterior (behind) to the breastbone.

Definition of immune cells

Leukocytes are white blood cells, which are the primary cells of the immune system responsible for defending the body against infectious diseases and foreign invaders.

Definition of metabolic pathways

Anabolism is the metabolic process that builds larger, complex molecules from smaller ones, requiring an input of energy. The process of breaking down complex molecules to release energy is catabolism.

Answer:

Question 18

• Anterior
• Proximal
• Inferior
• Posterior (Correct answer)

Question 19

• True (Correct answer)
• False

Question 20

• True
• False (Correct answer)