1. Introduction to Anatomy & Physiology

2. Cell Chemistry & Cell Components

3. Energy & Cell Processes

4. Tissues & Histology

5. Integumentary System

6. Bones + Skeletal Tissues

7. Skeletal System

8. Joints

9. Muscles and Muscle Tissue

10. Muscular System

11. Nervous Tissue

12. Central Nervous System

13. Peripheral Nervous System

14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

17. Blood

18. Cardiovascular System: the Heart

19. Cardiovascular System: Blood Vessels

20. Lymphatic System

21. Immune System

22. Respiratory System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

28. Pregnancy and Human Development

29. Heredity

Guided Toc

New Guided

Capillary Exchange and Edema

Hydrostatic and osmotic pressure | Introduction to #edema

Capillary Bulk Exchange: Filtration & Reabsorption

net filtration pressure (NFP) is negative

A positive net filtration pressure (NFP) would result in filtration. A negative NFP would result in reabsorption. NFP is affected by net hydrostatic pressure (HP) and net osmotic pressure (OP). If net HP is greater than net OP, filtration results. If net HP is less than net OP, reabsorption occurs. This is easier to remember if you think of HP as a filtration force and OP as a reabsorption force.

net hydrostatic pressure (HP) is greater than net osmotic pressure (OP)

osmotic pressure (OP) in the capillary is high

net hydrostatic pressure (HP) is less than net osmotic pressure (OP)

Fluids are likely to leave or filter out of the capillary if __________.

Capillary exchange and bulk flow

Capillary Exchange

Capillary exchange

Capillary Pressures and Capillary Exchange

Capillary Exchange and Edema, Animation

CAPILLARY EXCHANGE

osmotic pressure in the interstitial fluid

Hydrostatic pressure pushes fluids across the wall of the vasculature.

hydrostatic pressure in the interstitial fluid

At the arteriolar end of a capillary, __________ pushes fluid into the capillary.

A positive net filtration pressure (NFP) would force fluid out of the blood. A negative NFP would result in reabsorption.

If the net filtration pressure (NFP) is positive, then fluid is reabsorbed into the blood.

Continuous capillaries are the most abundant type of capillary. The lining of these capillaries is continuous; there are tight junctions between the endothelial cells that make up continuous capillaries. Fenestrated capillaries have pores, or fenestrations. These pores make fenestrated capillaries more permeable to small solutes and fluids than continuous capillaries. Fenestrated capillaries are found wherever active filtration or absorption occurs (e.g., small intestines and kidneys). Sinusoid capillaries are leaky capillaries because of large intercellular clefts among the endothelial cells. These capillaries allow large molecules and even blood cells to pass into the surrounding tissue. Sinusoid capillaries are found in the liver, bone marrow, spleen, and adrenal medulla.

capillaries found in the glomerulus of the kidney

The vessels that exhibit the lowest level of permeability are the __________.

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