lab lymph

What is the fundamental type of lymphatic tissue?

Connective Tissue

What are the specific subtypes of lymphatic tissue?

Loose, Dense, Nodular

What does "loose" refer to in lymphatic tissue?

Scattered distribution

What are the primary lymphatic organs?

Thymus, MALT, Lymph node, Spleen

What does MALT stand for?

Mucosa Associated Lymphoid Tissue

Where can loose lymphatic tissue be found?

Esophagus, Trachea

Where can dense and nodular lymphatic tissue be found?

Ileum, Appendix

What are lymphoid nodules also known as?

Lymphoid follicles

What is the main area of interest in the esophagus for lymphatic tissue?

Mucosa

What are the layers of the esophagus?

Mucosa, Submucosa, Tunica muscularis, Tunica adventitia

What type of epithelium is found in the esophageal lining?

Stratified squamous non-keratinized epithelium

What is the connective tissue in the lamina propria of the esophagus?

Loose connective tissue with scattered lymphocytes

What type of muscle is found in the muscularis mucosa?

Smooth muscle

What glands are found in the esophageal submucosa?

Deep esophageal glands

What type of epithelium lines the trachea?

Pseudostratified columnar ciliated epithelium with goblet cells

What type of glands are found in the trachea?

Tubuloalveolar mixed glands

What type of muscle bridges the gap between C-shaped cartilage in the trachea?

Trachealis muscle

What type of cartilage is present in the trachea?

Hyaline cartilage

What is the distinguishing feature of the ileum?

Peyer’s patches

What type of epithelium lines the ileum?

Simple columnar epithelium

What type of lymphatic tissue is found in Peyer’s patches?

Nodular lymphatic tissue

What type of lymphatic tissue is scattered in the lamina propria of the ileum?

Dense lymphatic tissue

Where is the appendix located?

Lower right quadrant of the torso

What distinguishes the appendix from the ileum?

No fingerlike projections

What type of epithelium lines the appendix?

Simple columnar with goblet cells

What structures are found in the lamina propria of the appendix?

Intestinal glands, Dense LT, Nodular LT

What are the two types of lymphoid nodules?

Primary and Secondary

What is the characteristic of a primary lymphoid nodule?

Uniform cell density and staining

What is the characteristic of a secondary lymphoid nodule?

Central pale-staining germinal center

What is found in the germinal center of a secondary lymphoid nodule?

Lymphoblasts that develop into plasma cells

What is the dark-staining portion of a secondary lymphoid nodule called?

Mantle

What divides the thymus into lobules?

Septa

What are the two main regions of the thymus?

Cortex and Medulla

What is the characteristic cell type of the thymic cortex?

Thymocytes (Lymphoblasts)

What type of lymphatic tissue is found in the thymic cortex?

Dense lymphatic tissue

What is a distinguishing feature of the thymic medulla?

Hassall’s corpuscles

Where are Hassall’s corpuscles located?

Thymic medulla

Where are palatine tonsils located?

Lateral oropharynx

What type of connective tissue forms the tonsillar capsule?

Dense connective tissue

What type of epithelium lines the exposed portion of the tonsils?

Stratified squamous non-keratinized epithelium

What are the spaces within the tonsils called?

Tonsillar crypts

What is the Filipino term for lymph nodes?

Kulani

What type of connective tissue makes up the lymph node capsule?

Dense irregular connective tissue

What are the extensions of the lymph node capsule called?

Trabeculae

What are the spaces beneath the capsule called?

Subcapsular sinuses

What are the three layers of the lymph node?

Cortex, Paracortex, Medulla

Where are lymphatic nodules found in the lymph node?

Cortex

What type of cells are dominant in the paracortex?

T-cells

What are the two components of the medulla in a lymph node?

Medullary cords, Medullary sinuses

What type of connective tissue makes up the spleen capsule?

Dense irregular connective tissue with smooth muscle

What are the two main regions of the spleen?

Red pulp, White pulp

What structures are found in the red pulp?

Splenic cords (Billroth cords) and Splenic sinuses

What is the function of splenic cords?

Contain macrophages and blood cells

What type of cells line splenic sinuses?

Stave cells

What is the main component of white pulp?

Lymphatic nodules of B-lymphocytes

What structure is characteristic of white pulp?

Central arteriole surrounded by PALS

What does PALS stand for?

Peri-arteriolar Lymphatic Sheath