Macrophages destroy old red blood cells in the ______ and ______.Multiple choice question.liver; thymusthymus; spleenbone marrow; spleenthymus; bone marrowliver; spleen

The spleen and the liver contain ______ that remove _____ from the blood.Multiple choice question.proteins; white blood cellsmacrophages; old erythrocytescavities; proteins

Most blood cells form in ______ tissue in the red marrow of certain bones.Multiple choice question.lymphatichemopoieticadiposeepithelial

Select all that applyWhich are characteristics of macrophages?Multiple select question.They are phagocytes.They have a regular shape.They kill microorganisms.They are small cells.

Macrophages arise from which of the following?Group of answer choicesMonocyteNeutrophilEosinophilLymphocyteBasophil

The hollow parts of certain long bones contain ______ tissues that produce most blood cells. Multiple choice question.lymphatichematopoieticcartilaginousosseous