Provide a pathway through which blood vessels & nerves may enter the lymph node.

lymphoid cells monitor the blood for foreign materials, filters blood

Immature lymphocytes migrate to the thymus during embryonic development

T-cells within the thymus don’t participate in the immune response because

are along the posterior ⅓ of the tongue

The lymph node medulla has

Formed elements are stored in

______ in the cortex secrete several thymic hormones that stimulate t-cell maturation & differentiation

When t-cells differentiate they migrate to the

are in the posterolateral region of the oral cavity

The lymphocytes undergo cell division

Act like enlarged capillaries that carry blood

T-cell maturation & differentiation process occurs only

the mature t-cells can enter the blood & migrate to other lymphatic system structures because

is in the posterior wall of the nasopharynx

Consists of lymphoid nodules & lymph sinuses called cortical sinuses.

Merge to form small veins & the filtered blood leaves the spleen via the splenic vein.

Has immature t-cells & some macrophages

subdivide the thymic lobes into lobules

The lymphatic system aids the ______ system by transporting excess interstitial fluid instead of blood.

Contain an outer region of t-cells surrounding an inner germinal center that houses proliferating b-cells & some macrophages.

When more erythrocytes are needed during exercise, they re enter circulation (Red pulp)

has epithelial cells & t-cells that have completed maturation

Shrinks as you age

Lymph from the right leg enters the bloodstream through the ______