ID: A 38. The palatine tonsils are located on each side of the throat. 39· The t
ID: 3524124 • Letter: I
Question
ID: A 38. The palatine tonsils are located on each side of the throat. 39· The thymus appears yellowish early in childhood because of the high concentration of fat 40. The fetal thymus forms immature lymphocytes, which then move to the bone marrow for the final stages of lymphocyte development before birth. 41. The thymus plays an important role in "seding" other lymphatic tisue uch as the splen and lymph nodes with lymphocytes. 42. The size of the spleen is relatively constant in different individuals, regardlss of sex or age. 43. The spleen removes imperfect platelets from the blood. 44. The spleen is not classified as a vital organ. 45. Anastomoses are not characteristic of lymphatic vessels, and therefore a malignant tumor in one breast cannot spread to the other breast. 46. Thymosin enables lymphocytes to develop into mature T cells, which attack foreign or abnormal 47. Lymphedema, a swelling of the tissues of the extremities, may be treated by diuretics, bed rest, and cells elevation of the involved extremities. 48. Hodgkin and non-Hodgkin are categories of lymphangitis. 49. Patients with immunodeficiencies such as AIDS often develop a malignancy of lymphoid tissue. 50. Lymphatic capillaries that operate in the villi of the small intestine are called lacteals 51. The lymphatic system contributes to the circulatory system. 52. Peyer patches make up the structural framework of both the spleen and tonsils. 53. Lymph does not have the ability to clot 54. The milky lymph found in lacteals after digestion is called chyle. 55. Activities that result in the flow of lymph are breathing movements and skeletal muscle contractions. 56. The hilus is a small depression on a lymph node from which the efferent lymph vessel exists.Explanation / Answer
38. TRUE.
Palatine tonsils are lymphoid tissue that are present on left and right side of the back of the throat. It is located on the lateral wall of pharynx. As it is consist of lymphoid tissue, it mainly is responsible for protection, it entraps dust and pathogen in the inhaled air.
39. FALSE
Note: The thymus in children is pinkish in color. As the child grows old they develop more fat and that is why thymus seems yellowish in adult. Also adult thymus is smaller in size than children.
40. FALSE
Note: Fetal lymphocytes are generated from fetal liver and yold sac.
41. TRUE
Note: Thymus produces mature lymphocytes which then travels to peripheral lymphoid organs to generate protection.
42. FALSE
Note: Size of spleen is significantly depends on gender and age and physical health. With age spleen size increases, with height spleen size increases. Male and female has different spleen size. An infection in the body also enlarges the spleen.
43. TRUE
Note: The imperfect platelets are removed in spleen via antibody mediated clearance of spleen macrophages.
44. TRUE
Note: Spleen is the largest organ of lymphatic system, takes part in fluid balance and fight against infection. It is not a vital organ as we can live without it.
45. FALSE
Note: Anastosomes are characteristics of lymphatic system. Lymph capillaries has very fine interconnections and spread all over the body. So malignant in one breast can spread to the other.
46. TRUE.
Note: Thymosin is a hormone secreted by thymus gland. It helps in the development of T cells into mature T cells.
47. FALSE
Note: Lymphedema is the swelling of the lymphatic tissue. Diuretics is generally treated for swelling in other part of the body but generally has no effect on lymphedema.
48. FALSE
Note: Lymphangitis is the inflammation or an infection of lymphatic system. Whereas Hodgkin's or Non-hodgkins are type of lymphoma or tumor of lymphatic system.
49. TRUE
Note: AIDS is an immunodeficiency disease. AIDS patient due to weak immune system are unable to fight against change in self cells to malignant. So they usually developed lymphoma or malignancy of lymphatic system.
50. TRUE
Note: Lactael is the lymphatic vessel of small intestine, which absorb chyle, a misture of lymph and fat droplets.
51. TRUE
Note: Lymphatic system is a special form of circulatory system. It exchange waste materials from tissue and dumps into circulatory system for excretion. It also transport immune cells from blood to infected area.
52. FALSE
Note: Peyer's patch are bunch of lymphoid nodules which can be seen as oval shaped structure on the wall of the ileum of small intestine.
53. FALSE
Note: Lymph does contain some clotting factors. Unlike blood it does not contain thrombocytes. But lymph can be clotted if initiated.
54. TRUE
Note: Chyle is a milky fluid consists of lymph, fat droplets. It forms during the digestion of food inside small intestine. The chyle along with the nutrients is taken up by lymphatic vessels called lacteals.
55. TRUE
Note: Lymph has no pumping system. So lymph circulation is generally maintained by peristalsis of the muscle tissue, contraction of muscle, valves, and breathing movement.
56. TRUE
Note: Hilium or hilius is the depression on the surface of the lymph node from where efferent lymphatics comes out and blood vessels enters and exits.