histology Flashcards
epithelium of gall bladder
simple columnar
gall bladder function: concentrate bile produced by liver => absorptive function
therefore, more likely to be simple epithelia than stratified!
pseudostratified columnar epithelium characteristic of what
upper respiratory tract
4 types of lung cancer + 1
small cell carcinoma
*rapidly spread and metastasize, associated with SMOKING, ADH/ACTH-secreting tumours
squamous cell
*slow growing, late metastasize, large pink tumour cells, associated with hypercalcaemia => therefore PTH secretion
adenocarcinoma
*GLANDULAR structure, usually in NON-smokers
large cell
*undifferentiated and literally large
mesothelioma
*malignancy from pleural surface, associated with asbestos, no metastasis
Barrett’s esophagus is what
metaplasia!!
non-keratinised stratified epithelial cells replaced by simple columnar epithelial cells when exposed to stomach acid (E.G. during stomach acid reflux)
note: metaplasia is reversible!!
artery or vein contain more elastic fiber
ARTERIESSSSS
characteristic of cutaneous arteriole
smaller diameter, with a few layers of smooth muscle cell
aorta
elastic artery => THICK layer of elastic fibers. look squiggly ww
- larger, more elastic
- smaller, more muscular
vena cava
smooth muscle in adventitia, very large lumen size
thoracic duct
lacks basal lamina
has large lumen size
!!!lack of RBC in lumen
cutaneous capillary
no smooth muscle!
tunica intima vs tunica media vs tunica adventitia
intima: thinnest layer, contains ENDOTHELIAL cells
media: THICKEST layers, composed of multiple concentric layers of smooth muscles fibres (red)
adventitia: connective tissue
Hurthle cells typically seen in what type of thyroiditis?
chronic lymphocytic thyroiditis = hashimotos disease
