Chapter 2- Human body structural levels

b. Epithelial

c. nervous

d. glandular

e. muscular

2. which one is the smallest structural and functional unit of the body ?

a. cell

b. tissue

c. organs

d. organelles

3. which system in the human body removes waste from the blood and excretes them ? (possible best answer)

a. Digestive system

b. urinary system 

c. integumentary system

d. respiratory system

4. which human body structural order is correct?

a. cells, organs, tissues, systems

b. organs, cells, tissue, systems

c. cells, tissues, organs, systems 

d. cells, tissues, systems, organs