lab 3 Flashcards
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simple squamous epithelium (WTLF, F, L)
thins cells, light passing through, sort of spread out, tile like
allows diffusion and filtration, secretes serous fluid in serous membranes
blood vessels, alveoli, serous membranes
simple cuboidal
single layer, look for a bunch of nuclei with some of them forming circles or ovals
secretes hormones, absorb water + other solutes
kidney lining, thyroid gland
simple columnar
look for somewhat uniform nuclei with some folds, goblet cells, maybe microvilli
can be ciliated or non
ciliated - protection from fluid loss, moves mucus
non - secretes mucus, absorb nutrients
ciliated - bronchioles / oviducts
non - gastrointestinal cells with microvilli
pseudostratified columnar
similar to stratified columnar but with more nuclei and theyre less organized. sort of a mess, with goblets
ciliated - protect from invasion in respiratory tract
non - absorption / secretion male urethra
ciliated - upper respiratory tract
non - urethra (male)
stratified squamous
racks on rack of flat cells
keratinized - skin
non - vagina / cheek
keratinized - strength, protec from abrasion, fluid loss, UV
non - abrasion
urothelium
less see through than simple squamous but similar. can see “shadows” of cells behind
lines hollow organs like urinary bladder
prevents leakage, abrasion from high pressure fluids
pancreas
buncha larger lobes with lighter pink parts (islets)
behind the stomach
endocrine - secreted hormones that regulate blood sugar and glandular secretion
exocrine - release enzymes to break down food
salivary gland
pizza like things (acini), will be a mix of mucus acini (lighter colour) and serous acini (darker), pizza things wont always be round, but look for those clusters
around the oral cavity
secrete saliva into the mouth (exocrine)
sebaceous gland
look for long big portion (hair follicle) with glands connected to it
in the pores of skin with the hairs
produced and secretes sebum
sudoriferous gland
donut like calimari cells
in the dermis
produce and secrete sweat
collagen fibres
often in bundles, strong but not stiff, found in bone, cartilage, tendons and ligaments
elastic fibres
strong, can be stretched 150x without breaking, found in skin, blood vessels, and lungs
reticular fibres
from a branching network, provide support and strength, form framework for spleen and lymph nodes, and basement membranes
areolar CT
stringyy with dots
has all fibres
widely distributed in body
support, reinforce, provide stretch. serves as packing material for body cavities
adipose CT
white bubbles
around the heart and other organs
insulates body and stores energy in the form of triglycerides, supports and protects organs
reticular CT
dark borders around cells, resembles maze
spleen and lymph nodes
filters substances like lymph
dense regular CT
array of lines going in the same direction
part of tendons and ligaments
have great strength
hyaline cartilage
look for hoove print like structures
most common cartilage, found between bones and joints
provides a smooth surface between bones and joints, comprises fetal skeleton before ossifiaction
bone
looks like the maze from the maze runner
comprises skeleton
provides supports, structure, and protection for the body
blood smear
purple looking cells (leukocytes) and many faint red/pink cells (RBCs)
in blood vessels
transport o2, gases, water, cells, hormones, platelets
skeletal muscle
resembles spagetti with lots of stripes, nuclei between some of the cells
attaches to bone via tendons
produced voluntary movement, generates heat
cardiac muscle
looks like a badly done hardwood floor, lots of intercalated discs
forms myocardium
involuntary movement
smooth muscle
looks like a buncha skinny worms
found in urinary bladder, airways, and small intestine
facilitates paristalsis, and constriction of airways
