Items Question How are red blood cells able to move through narrow vessels to carry oxygen throughout a multicellular organism? (1 point) Responses They are long and thin with a tail-like end. They are long and thin with a tail-like end. They are small because their organelles are smaller than those of other cells. They are small because their organelles are smaller than those of other cells. They are flexible because they lack a plasma membrane. They are flexible because they lack a plasma membrane. They are small because they lack a nucleus. They are small because they lack a nucleus.