IB Biology Topic B3.2.13 Drainage of Excess Tissue Fluid Into Lymph Ducts Revision Notes (HL)

IB Biology Topic B3.2.13 Drainage of Excess Tissue Fluid Into Lymph Ducts Revision Notes (HL) | RevisionDojo

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Draining Excess Tissue Fluid: How the Lymphatic System Prevents Oedema

Not all tissue fluid returns to the capillaries, so the lymphatic system collects the excess and returns it to the blood.

Definition

Lymphatic system

A network of vessels, tissues, and organs that work together to drain excess tissue fluid and return it to the blood, while also aiding immune function.

From Tissue Fluid to Lymph: Where the Excess Goes

Most filtered fluid is reabsorbed into the capillaries, but a small excess is left behind in the tissues each day.

If this excess stayed in the tissues, it would build up and cause swelling, called oedema.
The excess fluid instead enters blind-ended lymphatic capillaries, and once inside it is called lymph.

Lymphatic Capillaries: Built to Let Fluid In but Not Out

Lymphatic capillaries have thin, permeable walls made of a single layer of endothelial cells.
Gaps between these cells act as one-way flaps, letting fluid in but not out.
Their blind-ended structure means fluid can only be collected, not lost.

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Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Draining Excess Tissue Fluid: How the Lymphatic System Prevents Oedema

Not all tissue fluid returns to the capillaries, so the lymphatic system collects the excess and returns it to the blood.

Definition

Lymphatic system

A network of vessels, tissues, and organs that work together to drain excess tissue fluid and return it to the blood, while also aiding immune function.

From Tissue Fluid to Lymph: Where the Excess Goes

Most filtered fluid is reabsorbed into the capillaries, but a small excess is left behind in the tissues each day.

If this excess stayed in the tissues, it would build up and cause swelling, called oedema.
The excess fluid instead enters blind-ended lymphatic capillaries, and once inside it is called lymph.

Lymphatic Capillaries: Built to Let Fluid In but Not Out

Lymphatic capillaries have thin, permeable walls made of a single layer of endothelial cells.
Gaps between these cells act as one-way flaps, letting fluid in but not out.
Their blind-ended structure means fluid can only be collected, not lost.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic B3.2.13: Drainage of Excess Tissue Fluid Into Lymph Ducts Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Draining Excess Tissue Fluid: How the Lymphatic System Prevents Oedema

From Tissue Fluid to Lymph: Where the Excess Goes

Lymphatic Capillaries: Built to Let Fluid In but Not Out

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Draining Excess Tissue Fluid: How the Lymphatic System Prevents Oedema

From Tissue Fluid to Lymph: Where the Excess Goes

Lymphatic Capillaries: Built to Let Fluid In but Not Out

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account