Question

question 7
b cells mature in the _____________.
○ heart
○ thymus
○ spleen
○ bone marrow

question 8
t cells mature in the _____________.
○ thymus
○ spleen
○ bone marrow
○ heart

Explanation:

Question 7

B cells are a type of lymphocyte. In the immune system, B cells mature in the bone marrow. The heart is for circulation, thymus is for T - cell maturation, and spleen is for filtering blood and immune responses but not B - cell maturation.

T cells are also lymphocytes. T cells originate in the bone marrow but mature in the thymus. The spleen is for immune response and blood filtration, bone marrow is for B - cell maturation and T - cell origin, and heart is for circulation.

Answer:

D. bone marrow

Question 8