Study Notes on Atmospheric Composition and the Lymphatic System

Nitrogen is the most abundant gas in Earth's atmosphere.
- Contribution: Nitrogen comprises approximately 78% of the atmosphere.
Oxygen is also a significant component of the atmosphere but makes up a smaller percentage compared to nitrogen.
- Contribution: Oxygen accounts for about 21% of the atmosphere.

The lymphatic system plays a crucial role in the immune response by filtering and cleaning lymph fluid.
Bacteria and other debris are actively removed from lymph nodes.
The specific type of cell responsible for removing debris and bacteria from the lymph in the sinuses is known as:
- Phagocytic cells: These cells are part of the immune system and specialize in engulfing and digesting cellular debris and pathogens.
- Other options provided for the removal of debris include:
- Pinocytic cells
- Plasma cells
- Trabecular cells
- Germ cells
- Among these, only phagocytic cells are directly involved in the active removal process within lymph nodes.