Any foreign object that gains entry into the cell is immediately engulfed by the ________ and is completely broken into simple digestible pieces.

The correct answer is D. Lysosomes.

Lysosomes are small, membrane-bound organelles that contain digestive enzymes. These enzymes can break down a variety of substances, including foreign objects that have entered the cell. Lysosomes are essential for the cell’s ability to protect itself from infection and to recycle nutrients.

RBCs, or red blood cells, are responsible for carrying oxygen throughout the body. Platelets are involved in blood clotting. Haemoglobin is a protein found in red blood cells that carries oxygen.

While all of these organelles are important for the cell’s function, only lysosomes are capable of digesting foreign objects.