Special lymphatic vessels that absorb fats and transport them from the digestive tract to the blood are called ____.

Capsular extensions of the lymph node, which divide the node internally into a series of compartments with germinal centers, are called ____

Chemicals released by sensitized T lymphocytes to keep us healthy are known as ____.

The macrophages of the aggregated lymphatic follicles found in the walls of the small intestine destroy bacteria and prevent the bacteria from infecting and penetrating the walls of the intestine. These aggregated follicles are also known as ____.

Immunity that can be acquired naturally, such as when we are exposed to a bacterial or viral infection, or that can be acquired artificially, such as when we receive a vaccine, is known as ____.

Cells that are descendants of activated T and B cells produced during an initial immune response, which exist in the body for years, enabling it to respond quickly to future infections, are known as ____.

Lymphocytes that produce antibodies and provide humoral immunity, which is particularly effective against circulating bacterial and viral infections, are called ____.

The lymphocytes that kill virus-invaded and cancerous body cells and are also involved in graft rejections are the ____.

The main collecting duct of the lymphatic system is the left lymphatic duct, also known as the ____.

Antigens cause the immune system to produce high molecular weight proteins called immunoglobulins or ____.

The immunity provided by the T lymphocytes, effective against fungi, parasites, intracellular viral infections, cancer cells, and foreign tissue implants, is known as ____.

Immunoglobulin G (IgG), found in tissue fluids and plasma, attacks viruses, bacteria, and toxins. It also activates a set of enzymes that attack foreign antigens; these enzymes are known as ____.

Which of the following is involved with the development of T lymphocytes in the fetus and infants?

Tears from the lacrimal gland and saliva contain an enzyme that destroys bacteria; this enzyme is ____.