Tonsils- Physiological role Provide Immunity trap bacteria and antigens allow the body to produce antibodies against them provide local immunity: viruses, bacteria and other infectious contaminants and hold on to them before the immune system goes in for the kill. Process Lymphatic Fluid Tonsils process lymphatic or lymph fluid in unison with other lymphoid tissue. Lymph fluid is circulated in the tissues of the lymphatic system. The lymphatic system functions to remove interstitial fluid from tissues and adjacent organs, to absorb fatty acids and transport them into the circulatory system, and to transport immune cells to and from lymph nodes. Lymph fluid contains fats, proteins and lymphocytes, which are a type of white blood cells. It plays a primary role in filtering and destroying germs and toxins. Produce Antibodies Tonsils produce antibodies that neutralize respiratory infections (e.g. pneumonia, bronchitis, ear infections, laryngitis, sinusitis and rhinitis) that enter through the throat, mouth or nose. Antibodies (or immunoglobulins) are proteins that are found in the blood and other bodily fluids. They are produced by various components of the body's immune system and provide protection against chemicals, viruses, parasites, fungi and bacteria. tonsillar B cells (a type of palatine tonsil cells) mature to produce five classes of antibodies. They produce specific antibodies against staphylococcus aureus, haemophilus influenzae, streptococcus pneumoniae, poliovirus and diptheria toxoid. JACKIE PETER & DANIAL HAFIZ TONSIL HISTOLOGY PART LYMPHATIC NODULE DIFFUSE LYMPHATICS TISSUE STRATIFIED SQUAMOUS EPITHELIUM, SEMILUNAR FOLD VESTIBULAR FOLD VESTIBULAR A chamber or channel opening into another part EPIGLOTTIS PARAEPIGLATTIC TONSIL, LARYNX, 1.5., CAT. Palatine Tonsil, Dog In the dog the entire tonsil lies within a fossa ( small hollow) and is covered in part by a semilunar fold. The palatine tonsils of carnivores lack crypts. LYMPHATIC NODULE FOSSA STRATIFIED SQUAMOUS EPITHELIUM, FOSSA SEMILUNAR FOLD STRATIFIED SQUAMOUS EPITHELIUM SKELETAL MUSCLE CRYPTS-A SMALL TUBULAR GLAND, PIT, OR RECESS. f (x) increase surface area Palatine Tonsil, Dog. A portion of a tonsil and semilunar fold. Palatine Tonsil, Dog STRATIFIED SQUAMOUS EPITHELIUM, FOSSA SEMILUNAR FOLD SALIVARY GLANDS FOSSA STRATIFIED SQUAMOUS EPITHELIUM, TONSIL DIFFUSE LYMPHATIC TISSUE LYMPHATIC NODULE Palatine Tonsil, Dog. Mixed salivary glands are associated with the wall of the tonsils in carnivores. In other species only mucous glands are present. SEROUS ACINUS SEROUS DEMILUNE MUCOUS ACINUS ACINUS - A Small Sac-like Cavity In A Gland, Surrounded By Secretory Cells. Palatine tonsil - horse STRATIFIED SQUAMOUS EPITHELIUM CRYPT LYMPHATIC NODULES PALATINE TONSIL, HORSE STRATIFIED SQUMOUS EPITHELIUM LYMPHATIC NODULES DIFFUSE LYMPHATIC TISSUE CRYPT PALATINE TONSIL, HORSE LEUKOCYTE INFILTRATION STRATIFIED SQUAMOUS EPITHELIUM CRYPT