Lecture 4: Tissue recognition 1 Flashcards
what are squamous cells called?
keratinocytes
what is the epidermis
Surface epithelial layer in contact with external environmentw
what is the dermis
Middle layer with blood vessels, glands, nerves
what is the hypodermis (subcutis)
deepest layer with adipose tissue
what is the skin histology
stratified squamous keratinised epithelial cells (epithelium)
dense irregular connective tissue with elastic and collagen fibres (dermis)
loose connective and adipose tissue (hypodermis)
what is the order of stratum from superficial to deep
corneum
lucidum
granulosum
spinosum
basale
what is the stratum basale
attached to dermis and is one layer of germinal cells attached to basement membrane
what is the stratum spinosum
composed of keratinocytes
what is the stratum granulosum
composed of keratinocytes with granules in them
what is the stratum lucidum
refractive zone found in thick skin
what is the stratum corneum
thick and contains dead cells
what is the dermis histology
papillary layer
dermal papillae
papillar capillaries
reticular layer
what is the upper respiratory tract epithelium
ciliated pseudostratified columnar epithelium
what is the lower respiratory tract consisted of
simple squamos epithelium
what does the epithelial layer consist of
goblet cells (produce mucus)
basement membrane (for structure)
strong blood supply
what is the histology of the bronchioles
epithelium in bronchioles starts as pseudostratified columnar -> ciliated columnar as diameter narrows
contains secretory cells with microvilli called club cells and smooth muscle
what is the histology of terminal bronchioles
epithelium in terminal bronchioles = simple ciliated columnar -> cuboidal
contains secretory cells with microvilli called club cells and smooth muscle
what is the histology of respiratory bronchioles
epithelium is simple columnar and simple cuboidal
contains secretory cells with microvilli called club cells and smooth muscle
what is the histology of the alveoli
simple epithelium with pneumocytes
type 1 pneumocytes -> flattened, simple squamous
type 2-> dome shaped cuboidal (secrete surfactant)
what does the digestive system do
Regulates intake, processing and absorption
ingested nutrients and disposal waste products
what are the components of the tongue
- Stratified squamous non- keratinised epithelium
- DERMAL PAPILLAE->connective tissue in
epithelium reducing tongue
movement - FOLIATE PAPILLAE->ridges on lateral edges of tongue with
FURROWS (receive saliva) and taste buds
what muscles are in the tongue
skeletal muscle in 3 bundles
what epithelial cells are in the oesphagus
stratified squamous non keratinised cells
what type of epithelium is the stomach made up of
simple columnar
what tissue is the submucosa made up of
dense irregular connective tissue
what is filiform papilla involved in
substance movement, lightly keratinised
what are lingual salivary glands
small
produce specific saliva (serous and mucous)
what is the major role of the small intestine
nutrient absorption
what are the three distinct regions of the small intestine
duodenum
jejunum
ileum
what is the duodenum composed of and what does it do
DUODENAL GLANDS and absorbs nutrients and water
from food
what is the jejunum composed of and what does it do
ENTEROCYTES, MICROVILLI and a BRUSH BORDER and
absorbs SUGARS, AMINO ACIDS and FATTY ACIDS
what is the ileum composed of
lymphatic tissue called PEYER’S PATCHES and absorbs remaining nutrients with a main focus on VITAMIN B12 and recycles BILE
what are the two most important structures of absorption for small intestine
villi
microvilli
histology of the duodenum
What cells are in the stomach and what do they do
Mucous cell - secrete mucus
Parietal cells. - secrete hcl
Chief cell - secrete pepsiongoen
G cell - secretes gastric hormone
What do cardiac glands in the stomach do
Secrete mucous into gastric pits
What do fundic glands do
Secrete hcl
