biology - topic 3 - tissue fluid formation

1. Capillary Walls

capillary walls are only one cell thick, allowing for exchange of substances between blood and surrounding tissues.

2. Hydrostatic Pressure

At the arteriole end of the capillaries, the hydrostatic pressure is higher, pushing fluid and small molecules out of the capillaries and into the spaces between cells

3. Tissue Fluid Formation

This filtered fluid, which contains water, glucose, oxygen, and other substances, forms the tissue fluid surrounding the cells.

4. Exchange of Substances

Cells then obtain the substances they need, such as glucose and oxygen, from the tissue fluid.

5. Lymphatic System

The remaining tissue fluid, along with waste products and proteins that are too large to re-enter the capillaries, is drained into the lymphatic system, which eventually returns it to the circulatory system.

6. Factors Affecting Tissue Fluid Formation

Factors like high blood pressure, low blood protein content, or blocked lymphatic drainage can affect the amount of tissue fluid formed and potentially lead to edema (swelling).