2.8 The lymphatic system

• Biology
• Middelbare school
• vwo
• Leerjaar 2

Ch. 2 The circulatory system

Materials 

- iPad

- Pen, pencil

- note book

For a mark

- No

Lessonup

- Yes

Phones 

in your bag /

in bag closet 

today''s program 

quiz

2.8 the lymphatic system 

Homework

correct order :

Is blood vessel number 1 part of the systemic
circulation or the pulmonary circulation?

What is the cause of a heart attack?

1. Atherosclerosis in the aorta
2. Atherosclerosis in a pulmonary artery
3. Atherosclerosis in a coronary artery

Explain the importance of a low blood velocity in the capillaries

Learning objectives: 'what I am going to learn?'

I can .... 

1. describe how substances in the blood are delivered to tissues and cells 
2. describe how excess fluids and waste are removed from the tissues
3. explain the difference between tissue fluid and lymph

New key terms:

tissue fluid - lymph - lymph vessel - lymph capillary - lymph node

1. organs or tissues might get damaged or start to malfunction; f.e. skin transplant after burns or kidneys that start to malfunction
2. Organs: kidneys, heart, liver, pancreas, intestines, lung          Tissues:  skin, bone, cornea, veins, tendons
3. Donated issues/organs will be rejected when they are from a random person (not identical twin); the donated cells carry 'foreign' antigens that provoke the immune system of the acceptor produce antibodies 
4. Tissue typing  & immunosuppressive drugs 

the lymphatic system 

removes: 

• excess fluids

 

removes and destroys;

• waste 
• invaders
• cancer cells 

• arteries carry O2, nutrients, water
• capillaries : 

- O2 diffuses out, 

- water+nutrients are pushed out (due to blood pressure)

- phagocytes go out by themselves 

• capillaries : 

- CO2 diffuses in

- water and waste are taken in by 

• lymph vessels:

- excess water with waste, phagocytes, etc , are drained in 

Lymph = excess tissue fluid taken in by the lymph vessel

lymph vessel : like veins = contain valves 

                    : carry lymph to lymph nodes

lymph nodes: filters out waste, pathogens, phagocytes, etc. 

                   : contain lymphocytes 

homework

Learn 2.8 

Do exercises 67-71

Substances that may be present in the tissue fluid include carbon dioxide, glucose and oxygen. Which of these substances are transported to the cells by the tissue fluid?

1. Only glucose and carbon dioxide
2. Only glucose and oxygen
3. Only carbon dioxide and oxygen
4. Glucose, carbon dioxide and oxygemn