module 11—lymphatic and immune system
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35 Terms
Lymphatic organs contain a…
large number of lymphocytes (cells)
Lymphatic organs include…
bone marrow
thymus gland
lymph nodes
spleen
tonsils
Lymphatic organs
refer to photo
The lymphatic system contains…
lymph
Lymph definition
a clear liquid that circulates through the lymph vessels
What occurs as a result of lymph fluid building up?
edema
Edema from build up of lymph fluid can cause…
swelling
_____ occurs if this fluid builds up, causing swelling
edema
Edema
photo
The lymphatic system is a network of…
tissues, organs, and vessels
The lymphatic system is a network of tissues, organs, and vessels that help to…
maintain the body’s fluid balance and protect it from pathogens
Without the lymphatic system, neither the…
circulatory system nor the immune system would function
The lymphatic system is though of as an…
accessory to the circulatory system
The lymphatic system helps the…
circulatory system do its job
The two systems, the lymphatic and circulatory system, are…
directly connected together
The lymphatic system consists of fluid derived from…
plasma
What is the lymphatic fluid, which is derived from plasma, composed of…
lymph and white blood cells
especially lymphocytes and macrophages/monocytes
In the lymphatic system, lymph travels in only…
one direction
In the lymphatic system, lymph doesn’t…
circulate
General functions of lymphatic system
returns fluid from tissues to blood
returns large molecules to blood
absorb and transport fats
hemopoiesis
body defense/immunity
The general function, “returns fluid from tissues to blood”, percentages…
85% of fluids that leak out of blood return to blood via blood capillaries
15% of fluids returns via lymph capillaries
The general function, “returns fluid from tissues to blood”, in 24 hours…
lymphatics return fluid equivalent to entire blood volume
The general function, “returns fluid from tissues to blood”, if the lymphatic system becomes blocked…
edema occurs
The general function, “returns large molecules to blood”, leakage percentages…
25-50% of blood proteins leak out of capillaries each day
The general function, “returns large molecules to blood”, blood proteins that have leaked out of the capillaries cannot…
get back into capillaries
The general function, “returns large molecules to blood”, because blood proteins cannot get back into capillaries…
lymphatic capillaries pick them up and return them to the blood
The general function, “returns large molecules to blood”, if lymphatics are blocked…
blood protein decreases leading to fluid imbalances in the body
The general function, “absorb and transport fats”, special lymphatic capillaries called lacteals in villi of the small intestine…
absorb all lipids and fat soluble vitamins from digested food
The general function, “absorb and transport fats”, much bypasses the…
liver and goes straight to adipose tissues
The general function, “hemopoiesis”, have some…
WBC’s (lymphocytes, monocytes) are made in lymphatic tissues (not bone marrow) where it serves as the main supply of lymphocytes
The general function, “body defense/immunity”, lymphoid tissue is an…
important component of the immune system
The general function, “body defense/immunity”, lymphoid tissue is an important component of the immune system because it…
forms a diffuse surveillance defense system in all body tissues and organs
The general function, “body defense/immunity”, the major role of WBC’s is in…
body defense
The general function, “body defense/immunity”, lymphatic system screens…
body fluids and removes pathogens and damaged cells