2.8 the lymphatic system

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

2.8 The lymphatic system

Recap

Where are our capillaries? What is their function?

How do we recognize stuff (a.o. pathogens) in our body?

Today's goals

we will check that you understand 2.7 bloodgroups

You will have an understanding of what our lymphatic system is, and how it functions

Using the information from the previous slide, make a table of blood transfusions (fill in: C (clotting) NC (no clotting

I have blood type B can I receive blood from a person with blood type o?

1. Yes
2. No

Which substance from your blood plays an important part in your immune system?

1. Red blood cells
2. White blood cells
3. Platelets
4. Plasma proteins

you do a blood typing test:
anti-A: clots
anti-B: clots
anti-Rhesus: doesn't clot

1. AB+
2. AB-
3. 0+
4. 0-

Analogy: Your body as a city

Analogy: Your body as a city

Whole system	City	Body
Goods
Waste products
Source of goods
Transport of goods
Collection of waste products
Processing of waste products

Analogy: Your body as a city

Whole system	City	Body
Goods	Food, products, etc	Nutrients, oxygen
Waste products
Source of goods
Transport of goods
Collection of waste products
Processing of waste products

Analogy: Your body as a city

Whole system	City	Body
Goods	Food, products, etc	Nutrients, oxygen
Waste products	Sewage, garbage	CO2, waste products
Source of goods
Transport of goods
Collection of waste products
Processing of waste products

Analogy: Your body as a city

Whole system	City	Body
Goods	Food, products, etc	Nutrients, oxygen
Waste products	Sewage, garbage	CO2, waste products
Source of goods	Grocery store, the mall	Lungs, intestines
Transport of goods
Collection of waste products
Processing of waste products

Analogy: Your body as a city

Whole system	City	Body
Goods	Food, products, etc	Nutrients, oxygen
Waste products	Sewage, garbage	CO2, waste products
Source of goods	Grocery store, the mall	Lungs, intestines
Transport of goods	Cars, trucks	Blood
Collection of waste products
Processing of waste products

Analogy: Your body as a city

Whole system	City	Body
Goods	Food, products, etc	Nutrients, oxygen
Waste products	Sewage, garbage	CO2, waste products
Source of goods	Grocery store, the mall	Lungs, intestines
Transport of goods	Cars, trucks	Blood
Collection of waste products	Sewage system, waste disposal system	Kidneys, liver
Processing of waste products

Analogy: Your body as a city

Whole system	City	Body
Goods	Food, products, etc	Nutrients, oxygen
Waste products	Sewage, garbage	CO2, waste products
Source of goods	Grocery store, the mall	Lungs, intestines
Transport of goods	Cars, trucks	Blood
Collection of waste products	Sewage system, waste disposal system	Kidneys, liver
Processing of waste products	Garbage trucks, road sweepers	Lymphatic system

How do the waste products get collected?

At the transition from artery to capillary a part of the blood gets pushed out of the capillaries because of the high pressure

-> It becomes tissue fluid (dissolved oxygen and nutrients)

-> Also contains carbon dioxide and other waste products, gets partially reabsorbed by the capillaries

The rest of the tissue fluid flows into the lymphatic vessels

Lymphatic vessel

A bit similar to veins, how do they move the lymph, and where to?

2 minute thinking break

Lymph nodes: purify the lymph (Important for the immunesystem!)