Lymphatic System - Year 11 ATAR
HUMAN BIOLOGY Exam Questions and
Answers
lymphatic system functions - Correct Answers -To return tissue fluid to the circulatory
system and to defend the body from infection and disease
- collects fluid that escapes the circulatory system, processes it for infection and returns
it back to the circulatory system
- Provides defence against any pathogens
Lymph Node functions - Correct Answers -- Lymph enters the convex side of the lymph
nodes and enters out of the concave side
- Larger particles e.g bacteria is trapped within the fibrous mesh
- Macrophages engulf and harmful bacteria by phagocytosis
- Lymphocytes trigger specific immune response
- High amounts of lymphocytes causes swelling in the nodes
platlet plug formation - Correct Answers -platelets attach to the rough surfaces of the
damaged blood vessels to stop blood escaping
Fibrin - Correct Answers -A protein that creates a net like structure to trap surrounding
blood, plasma and platelets to form a plug
Lymphatic system structure - Correct Answers -- blind-ended lymph capillaries that are
connected to larger lymph vessels
- Lymph vessels are larger and more permeable than normal blood capillaries
- Larger lymph vessels have valves, the fluid only moves one way
- lymph nodes can be found along the lengths of the lymph vessels. .
Functions of lymph vessels - Correct Answers -- blood pressure is high in atrial end of
capillaries
- supplies cell with nutrients and oxygen while also collecting wastes
- Lymph Capillaries are permeable to pathogens and proteins
- Fluid flow in lymph capillaries due to the squeezing of lymph vessels from skeletal
muscles, there's also valves to prevent back-flow.
Lymph node structure - Correct Answers -Bean shaped 1-25 mm long
- surrounds by connective tissue framework that extends into the node
- contains lymphocytes, macrophages or plasma cells separated by fibre network.
HUMAN BIOLOGY Exam Questions and
Answers
lymphatic system functions - Correct Answers -To return tissue fluid to the circulatory
system and to defend the body from infection and disease
- collects fluid that escapes the circulatory system, processes it for infection and returns
it back to the circulatory system
- Provides defence against any pathogens
Lymph Node functions - Correct Answers -- Lymph enters the convex side of the lymph
nodes and enters out of the concave side
- Larger particles e.g bacteria is trapped within the fibrous mesh
- Macrophages engulf and harmful bacteria by phagocytosis
- Lymphocytes trigger specific immune response
- High amounts of lymphocytes causes swelling in the nodes
platlet plug formation - Correct Answers -platelets attach to the rough surfaces of the
damaged blood vessels to stop blood escaping
Fibrin - Correct Answers -A protein that creates a net like structure to trap surrounding
blood, plasma and platelets to form a plug
Lymphatic system structure - Correct Answers -- blind-ended lymph capillaries that are
connected to larger lymph vessels
- Lymph vessels are larger and more permeable than normal blood capillaries
- Larger lymph vessels have valves, the fluid only moves one way
- lymph nodes can be found along the lengths of the lymph vessels. .
Functions of lymph vessels - Correct Answers -- blood pressure is high in atrial end of
capillaries
- supplies cell with nutrients and oxygen while also collecting wastes
- Lymph Capillaries are permeable to pathogens and proteins
- Fluid flow in lymph capillaries due to the squeezing of lymph vessels from skeletal
muscles, there's also valves to prevent back-flow.
Lymph node structure - Correct Answers -Bean shaped 1-25 mm long
- surrounds by connective tissue framework that extends into the node
- contains lymphocytes, macrophages or plasma cells separated by fibre network.
