Answer: Carnivores have unique characteristics of their jaw articulation, or the joint between their upper and lower jaws, which enable them to more.
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Answer:
The correct answer will be option-D
Explanation:
Pulmonary Surfactant is a complex substance produced by the pneumocytes epithelial II cells in the alveolar sac.
The surfactant is composed of the proteins and lipids which plays a role in keeping alveoli open by reducing the surface tension formed between the air and liquid.
The surfactant act by forming a monolayer surface film which helps reduce the surface tension.
Thus, option-D is the correct answer.
2 respiratory system is mainly used for respiration which is allowing o2 in and pushing co2 out
