lymphatic

Question 1

Name one chemical barrier (non-specific) of the body which prevents bacteria and foreign/hamrful substances from entering our body systems

Answer 1

acid, enzymes

Question 2

Name one physical barrier (non-specific)of the body which prevents bacteria and foreign/harmful substances from entering our body systems

Answer 2

skin, mucus, cilia

Question 3

is the lymphatic system one way?

Answer 3

yes

Question 4

a phagocyte is…

Answer 4

a type of cell that is capable of engulfing and absorbing cells and particles

Question 5

what are lymphocytes?

Answer 5

Lymphocytes are a type of white blood cell (leukocyte) specific to the lymphatic system

Question 6

what is a pathogen?

Answer 6

a bacterium, virus or other microorganism that can cause disease

Question 7

what is an antibody?

Answer 7

a blood protein produced to a combat/counteract a specific antigen

Question 8

what are B-cells and T-cells?

Answer 8

B-cells and T-Cells are specific/adaptive components of the immune system? (they can change/adapt/respond to specific threats)

Question 9

Lymphatic vessels do not contain valves? (true or False)

Answer 9

false

Question 10

briefly describe the Lymphatic System?

Answer 10

A system/network of capillaries, vessels and nodes that take excess fluid from around the body, filter it and deliver it back to the bloodstream

Question 11

describe some of the things lymph nodes do…

Answer 11

• break down bacteria and other harmful cells from the lymph fluid
• vary in size, some are as small as a pinhead and others about the size of a baked bean
• are found throughout the body but can mainly be found in the neck, armpits, groin and tummy
• act as a filter, sometimes trapping bacteria and viruses causing them to become swollen

Question 12

what is an antigen?

Answer 12

any substance foreign to the body that will cause an immune response

Question 13

Which word beginning with ‘L’ is a fluid that surrounds all body tissues, is colourless and contains dissolved molecules, glucose, enzymes, hormones and nutrients as well as a high number of white blood cells called lymphocytes

Answer 13

lymph

Question 14

what are 2 organs in the lymphatic system?

Answer 14

-nodes
-thymus
-spleen
-tonsils
-appendix

Question 15

what are some things the spleen does/is?

Answer 15

• recycles old red blood cells
• stores platelets and white blood cells
• is a reservoir of red blood cells
• is not an essential organ
• has regenerative properties