.
Which statement about capillaries is correct?

Their walls are covered with cilia.

They warm and humidify inhaled air.

They move mucus through the lungs.

Their walls are only one cell thick.

Which of the following are not matched correctly? cd8+: directly destroy infected or cancerous cells t reg cell: reduce the adaptive response once threat passes t l: activate cellular branch (cytotoxic t cells, macrophages, nk cells) t 2: stimulate b cells to make antibodies t (cd4+): mhc i