The Structure of a Phagocyte and a Red Blood Cell

Structure of a Phagocyte:

Phagocytes are a broad group of white blood cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.
Their name comes from the Greek phagein, “to eat” or “devour”, and -cyte, “cell,” because of the way these cells completely consume particles.
They are developed in the bone marrow and have a lifespan of a few days.
Phagocytes are larger than red blood cells.
They contain a nucleus which is required for producing enzymes for digesting foreign particles.
Phagocytes are amoeboid in nature, meaning they can change their shape to surround and engulf particles in a process called phagocytosis.
Their cytoplasm contains granules filled with potent enzymes that aid digestion of ingested materials.

Structure of a Red Blood Cell:

Red Blood Cells, or erythrocytes, are the most common cellular element in the blood, and carry oxygen from the lungs to the body’s tissues and taking away carbon dioxide.
They are biconcave disc shaped, which provides a larger surface area for the diffusion of gases.
They are flexible and elastic, which allows them to squeeze through even the smallest blood vessels.
Red blood cells are filled with the protein haemoglobin, which is vital for transporting oxygen.
They lack a nucleus and most organelles, to allow for more room to carry haemoglobin.
Unlike most cells, red blood cells do not undergo cell division, but are continuously produced in the bone marrow. They have a lifespan of about 120 days after which they are destroyed in the spleen and liver.
In humans, mature red blood cells are approximately 6–8 micrometres in diameter.
Each human body contains about 20-30 trillion red blood cells.