Which of these engulf bacteria and break them down? a lymphocytes b phagocytes c t-cells b b-cells

B. phagocytes

A phagocyte is a specialized type of cell that is capable of ingesting as well as digesting the foreign particles entering the body of the organism which are potent enough to cause disease. These are bacteria, dust, chemical molecules and others. It is a special type of cell that extends the cytoplasm and engulfs the foreign agent completely to ingest and digest it by using enzymes and forms a vacuole to dispose it off from the body.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )