Question

question 7
0.25 pts
the smallest living units of structure and function in the body are:
○ molecules
○ cells
○ organelles
○ atoms.
question 8
0.25 pts
a plane through the body that divides the body into right and left sides is called:
○ sagittal.
○ frontal.
○ coronal.
○ transverse.
question 9
0.25 pts
the mediastinum contains all of the following except the:
○ trachea.
○ venae cavae
○ right lung.
○ esophagus.

Explanation:

Question 7

To determine the smallest living units of structure and function in the body, we analyze each option:

• Molecules: These are non - living chemical entities.
• Cells: Cells are known as the basic (smallest) living units that carry out the body's structural and functional roles.
• Organelles: They are components within cells and not independent living units.
• Atoms: These are non - living fundamental particles of matter.

We recall the definitions of body planes:

• Sagittal plane: It divides the body into right and left sides.
• Frontal (coronal) plane: It divides the body into anterior and posterior parts.
• Transverse plane: It divides the body into superior and inferior parts.

The mediastinum is the central compartment of the thoracic cavity. It contains structures like the trachea, venae cavae, and esophagus. The lungs (including the right lung) are located in the pleural cavities, not the mediastinum.

Answer:

B. cells (assuming the option for cells is labeled as B; if the original options had different labels, adjust accordingly. Based on the given options, the correct one is the "cells" option)

Question 8