Lymphatic System

Questions and Answers

70%

80%

40%

60% (correct)

To remove bacteria from the lymph fluid

To produce white blood cells

To pick up leaked fluids (correct)

To dump fluid into large veins

It is filtered to remove good cells

It is stored for later use

It is cleaned of bacteria and bad cells (correct)

It is mixed with blood

Because they are fighting off an infection Signup and view all the answers

The bloodstream Signup and view all the answers

To defend against bacteria and viruses that enter through the nose or mouth Signup and view all the answers

It filters blood and recycles broken down red blood cells Signup and view all the answers

It shrinks and becomes less important Signup and view all the answers

On the sides of the mouth toward the back Signup and view all the answers

Some white blood cells Signup and view all the answers

Study Notes

The lymphatic system is a network of vessels and body parts that collect fluids that leak out of cells and blood, comprising more than 60% of the body.
The system sweeps up leaked fluid and returns it to the bloodstream, preventing fluid buildup in body tissues.

The lymphatic system consists of lymph vessels, lymph nodes, and organs.
Lymph capillaries act as "little vacuum cleaners" to pick up leaked fluids and pass them along to lymph vessels.
Lymph vessels travel towards the neck, dumping fluid into large veins to return it to the bloodstream.

Lymph nodes are small, bean-shaped collections of tissue that remove bacteria and bad cells from lymph fluid.
They also produce white blood cells and antibodies to fight disease-causing cells.
There are hundreds of lymph nodes in the body, found in clusters in the thighs, armpits, and neck.
Swollen lymph nodes can indicate the body is fighting an infection.

Tonsils are lymph organs that defend against bacteria and viruses entering through the nose or mouth.
They are found on the sides of the mouth, towards the back.

The spleen is the largest lymph organ in the body, filtering blood to remove bacteria and harmful cells.
It recycles broken down red blood cells into new cells and produces some white blood cells.

The thymus gland is a lymph organ that helps develop the immune system in early life.
It stores immature white blood cells that grow into infection fighters, but becomes less important after puberty.