Question

Which of the following is a system of organs that collects oxygen from the external environment and transports it to the bloodstream?

a. Endocrine system
b. Immune system
c. Integumentary system
d. Respiratory system

Answer 1

Answer:D

Step-by-step explanation:

Respiration is the process of taking in oxygen and release of Carbondioxide in the lungs(breathing),the absorption of the oxygen in the alveolar, into the blood stream for distribution to tissues , the combustion of the metabolites(glucose,amino acids, and fatty acids and glycerol)with the inhaled oxygen to give energy as ATPS and water vapour.