Other slides Flashcards
What produces T3/T4 hormone?
Follicular cells in Follicles of Thyroid
What fills Thyroid follicles?
Colloid
(glycoprotein complex-thyroglobulin)
Cells outside of follicles in Thyroid
Parafollicular cells
- Calcitonin Secretion (decrease of Ca)
What muscle can we see on Thyroid Slide
SternoThyroud
Structures outside of Thyroid Follicles
- Solid cell nests (main & clear cells)
- Mixed Follicles
What does parathyroid gland secrete
Parathyroid Hormone
Increases Blood Ca2+
Cells in Parathyroid
- Chief Cells (hormone)
- Oxyphils (pink clusters)
Main 2 parts of Adrenal
- Cortex
- Medulla
Adrenal Cortex Origin
Mesodermal Origin
Adrenal Medulla Origin
Neural Crest Origin
Zones in adrenal
- Zona Glomerulosa
- Zona Fasciculata
- Zona Reticularis
Zona Glomerulosa
- Mineralocorticoids (aldosterone)
- Circular structures
- Lipid droplets (steroid synth)
Zona Fasciculata
- Glucocorticoids (cortisol)
- Narrow parallel rows
- Sinusoid capillaries
Zona Reticularis
- Androgens
- Lipofuscin Granules
- Pyknotic Nuclei
Adrenal Medulla cells and support
- Chromaffin Cells
- Reticular Fibers support
Endocrine Pancrease
Islets of Langerhans
What do Islets of Langerhans produce
Insulin / Glucagon
(others too)
Exocrine Pancrease
Serous Acini
Cells of Islets of Langerhans
- Alpha Cells: Glucagon
- Beta Cells: Insulin
What is special about intralobular Pancreatic ducts
Secrete bicarbonate to neutralize stomach acid in duodenum
2 Main Pineal Gland Cells
- Pinealocytes
- Astrocytes / Astroglial cells
Pinealocytes
(Pineal Gland)
- Melatonin
- Very Light
- Release free Ca
- Causes brain sand
Brain Sand
Corpora Arenacea
What recesses can we see near Pineal Gland
- Pineal Recess
- (suprapineal by habenular)
What commissure can be seen Pineal Gland
Posterior Commissure
(long stalk)
Thymus Main structure
Trabeculae separate into Cortical Caps
Framework of Thymus
Epithelial Reticulum / Cytoreticulum
Parts of Thymus Cortical Caps
Cortex & Medulla
Thymus Cortex
- Thymocytes (T-cells)
- Basophilic (dark)
Thymus Medulla
- T-cell maturation
- Enter postcapillary venules at corticomedullary junction
What can be seen in Thymus Medulla
- Hassal’s Bodies
- Concentric Epithelium
- Secrete Cytokine (thymic stromal lymphopoietin)
Main idea of Tonsil Area cells
- Follicles: B-cell dependent
- Interfollicular: T-cell dependent
What are the spaces in Palatine Tonsil
Crypts due to folding of Strat. Sq. non-K epithelium
What separates Palatine tonsil from surrounding Tissue
CT capsule
Hight Endothelial Venules (HEV)
Move Lymphocytes from bloodstream into Lymphoid tissue
What cells help B & T cells?
- Follicular Dendritic Cells
- Interdigitating Dendritic Cells
Where is Lingual Tonsil Situated
Root of Tongue
What does PVN produce
Oxytocin + ADH
What carries PVN products
Neurophysin
Supraoptico/Paraventriculo - hypophyseal tracts
Where do PVN products go
Neurohypophysis
Neurohypophysis Dev. from
Floor of Diencephalon
What cells make up Neurohypophysis
Pituicytes (astrocyte)
Dark Spots in Neurohypophysis
Herring bodies with Neurophysin Accumulation
Adenohypophysis Dev. from
Hypophyseal Placodes of Ectoderm
3 parts of Adenohypophysis
- Pars Distalis (anterior)
- Pars Tuberalis
- Pars Intermedia
What are irregular follicles in Pars Distalis of Adenohypophysis
Remnants of Rathke’s Pouch
What connects pituitary to Hypothalamus
Infundibulum
Acidophils Secrete
GH & Prolactin
Basophils Secrete
TSH, LH, FSH, ACTH
