Integumentary System Flashcards
serves as the animals’ first line of defense (also for offense)
integument
integument could be:
- thin
- thick
integument of protozoans
- pellicle
- cell membrane
thick protein coat
pellicle
integument of porifera
- pinacocytes
flat T cells on the skin of sponges
pinacocytes
pinacocytes are lined with ______
choanocytes
integument of cnidaria
- cnidocytes
- nerve cells
- interstitial cells
stinging cells with nematocysts
cnidocytes
trigger motor responses
nerve cells
unspecialized cells that are not active by default, but serve as replacements for dead cells
interstitial cells
integument of platyhelminthes
- single layer of ciliated cells (free-living form)
- syncytial layer that lacks cilia (parasitic form)
integument of nematoda
- cuticle
- epidermis / hypodermis
- muscle layer
epidermis . hypoderms of nematoda
- syncytial
muscle layer of nematoda
longitudinal muscles
integument of annelida
- cuticle
- epidermis
- muscle layers
cuticle of annelida
not molted
epidermis of annelida
setae / chaetae
muscle layers of annelida
- longitudinal
- circular
integument of of arthropoda
- exoskeleton / cuticle
the exoskeleton / cuticle of arthropoda are composed of
protein and chitin
integument of mollusca
- epidermis
- gland cells
- shells of calcium
- chromatophores
gland cells secretes ______
mucus
integument of echinodermata
- dermis
- “spiny skinned”
- thin skin covers endoskeleton
integument of echinodermata
- dermis
- “spiny skinned”
- thin skin covers endoskeleton
thin skin that covers endoskeleton
- tiny calcified plates and spines
- ossicles
ossicles refers to _____
skeletal plate
between the body and its external environment, and its structure is well adapted for local functional requirements
skin
biological activities of amphibian skin peptides
- anti-predation
- mating
- anti-microbic
- anti-parasitism
- neuronedocrine regulation
- analgesia
- wound-healing
- antioxidant
- immunoregulation
anuran amphibians
- Surinam horned frog
- American common toad
- Lake titicaca frog
- Hairy frog
- Diploid, tropical clawed frog
- Tetraploid, South African clawed toad
has numerous hyperkeratotic regions manifested as denticles, head horns, and ‘claws’ (arrows)
Surinam horned frog (Ceratophrys cornuta)
found world-wide in non-polar regions except Australia
American Common toad (Bufo anericana)
has dubious distinction of being a voracious, invasive pest whose skin secretion are lethal to many potential predators
Cane toad (B. marinus)
its ‘typically frog-like’ skin is thrown into folds (arrows) that act as accessory respiratory devices
Lake Titicaca Frog (Telmatobious culeus)
has so-called ‘hairs’ on the lateral body and femoral regions that also act as accessory respiratory devices
Hairy Frog (Trichobatrachus robustus)
layers of the epidermis (human skin)
- stratum corneum
- stratum lucidum
- stratum granulosum
- stratum spinosum
- stratum basale
most superficial layer of the epidermis
stratum coneum
only in thick skin
stratum lucidum
deepest layer of the epidermis
stratum basale
(layers of epidermis wherein)
cells are dead; represented only by flat membranous sacs filled with keratin. Glycolipids in extracellular space
stratum corneum
(layers of epidermis wherein)
cells are flattened; organelles detoriating; cytoplasm full of lamellated granules (release lipids) and keratohyaline granules
stratum granulosum
(layers of epidermis wherein)
cells contain thick undles of intermediate ilaments made of pre-keratin
stratum spinosum
(layers of epidermis wherein)
cells are actively mitotic stem cells; some newly formed cell become part of the more superficial layers
stratum basale
skin correlates of the epidermis
- callous
- blisters
- sin infections/disorders
- skin cancer
due to constant rubbing of skin - cell division is stimulated
callous