Immune/Lymphatic System Flashcards Preview

Histology Fall 2019 > Immune/Lymphatic System > Flashcards

Flashcards in Immune/Lymphatic System Deck (17):
1

functions of the immune system

protects the body from pathogens and abnormal cells, based on recognition of antigens which trigger an immune response, lymphocytes neutralize the antigen

2

primary and secondary organs of the immune system

lymph nodes, spleen, thymus, bone marrow (no capsule), primary sites produce lymphocytes B in bone marrow T in Thymus, lymph nodes and spleen are secondary, this is where the immune response occurs

3

MALT and its subdivisions

mucosa-associated lymphoid tissue, GALT, NALT, BALT, VALT

4

function of lymphatic vessels

similar to blood capillaries but with no basal lamina; abundant in skin, beneath mucus membranes in the respiratory, gut, and urinary tracts, skeletal muscle helps move lymph fluid

5

function of lymph nodes

bean shaped secondary lymph organ that filtrates the lymph before it returns to the thoracic duct. It also produces lymphocytes and synthesizes antibodies

6

structure and function of palatine tonsils

stratified squamous epithelium, tonsillar crypts, dense fibrous connective tissue separates the tonsil from underlying tissue, defense against bacterial and viral infections

7

structure and function of lingual tonsils

buried at the base of the tongue, stratified squamous epithelium, mucus glands and skeletal muscle

8

structure and function of pharyngeal tonsils

cilliated pseudostratified columnar epithelium, tonsillar crypts

9

importance of the thymus

this is where lymphocytes from the bone marrow differentiate into mature T cells, and this is a site of hemopoeisis in fetal development

10

structure of the thymus

flat bi-lobed organ, lobes consist of smaller lobes separated by connective tissue trabeculae, has a cortex and medulla, Hassal's corpuscles

11

structure and function of the spleen

filters blood, recycles iron, outer capsule is dense irregular connective tissue, trabeculae, red and white pulp

12

GALT

gut associated

13

NALT

nose associated

14

BALT

Bronchus associated

15

VALT

Vulvo-Vaginal associated

16

red pulp

blood sinuses, macrophages, lymphocytes and blood cells, contains capillaries

17

white pulp

lymphocyte aggregates