Lab Exam 1a Flashcards
Deuterostomata
Includes Echinodermata (sea stars) and all more derived; syn: radial cleavage, 3 germ layers, enterocoely
Ambulacraria
Hemichordata (acorn worms) and Echinodermata (sea stars); syn: pharyngeal slits and dorsal hollow nerve cord in larvae
Chordata
Includes Cephalochordata (lancelets) and all more derived; syn: notochord, dorsal hollow nerve cord, post-anal tail, pharyngeal slits, endostyle
Olfactores
Includes Urochordata (tunicates) and all more derived; syn: striated heart muscles, migratory neural crest cells, possibly myomeres
Vertebrata
Includes Myxiniformes (hagfish) and all more derived; syn: braincase, neural crest, hemoglobin, heart, neurogenic placodes, respiratory gills, muscular gut tube, tripartite brain,
More derived Vertebrata
Anaspida and Heterostraci; syn: vertebrae, radial fin muscles, 2+ semicircular canals, dermal bone
Cyclostomi
Petromyzontifores (lampreys) and Myxiniformes (hagfish); syn: vestigial vertebrae/arcualia in lampreys, well-developed medial fins, lingual cartilage, keratinized tooth-like structures
Petromyzontifores
lampreys; syn: well-developed eyes and fins, hyperosmotic, ammocoete larvae
Myxiniformes
hagfish; syn: hermaphroditic, isosmotic, loss of traits
Gnathostomata and Osteostraci
syn: cellular bone, heterocercal tail, paired muscular fins
Gnathostomata
Includes “Placodermi” and all more derived; syn: jaws, 3 semicircular canals
Eugnathostomata
(Chondrichthyes (cartilaginous fish) and Acanthodii) and Osteichthyes (bony fish); syn: 6-7 intrinsic eye muscles, continuous tooth replacement, true upper jaw, hyostylic and derived jaw suspension
Chondrichthyes
Includes sharks, rays, and chimaeras; ap: ceratotrichia, placoid scales, internal fertilization
Osteichthyes
Actinopterygii (ray-finned fish) and Sarcopterygii (lobe-finned fish); syn: lungs, lepidotrichia, bony endoskeleton, operculum, dorsal divided paired nares
Actinopterygii
(Neopterygii and Chondrostei (sturgeon and paddlefish)) and Cladistia; syn: ganoid scales, branchiostegal rays
Neopterygii
Teleostei and Holostei (gar and bowfin/Amia); syn: loss of spiracle, swim bladder replaces lungs
Teleostei
96% of fish; ap: cycloid and ctenoid scales, homocercal tail/caudal fin, mobile jaws
Sarcopterygii
Includes Actinistia (coelocanths) and all more derived; syn: muscular lobed fins, cosmoid scales, internal nares (choanae)
Actinistia
2 species of coelocanth; syn: intracranial joint, rostral organ, hyostylic jaw suspension, fatty lung
Rhipidistia
Includes Dipnoi (lungfish) and all more derived; syn: ventral lungs, labyrinthine teeth
Dipnoi
Syn: fusion of dorsal, caudal, and anal fins, tooth fusion, autostylic jaw suspension
Tetrapoda
Includes Acanthostegidae, Ichthyostegidae, and all more derived; syn: 4 dactylous limbs
Acanthostegidae
syn: enlarged notochord, loss of dorsal scales
Ichthyostegidae
syn: robust pelvic and shoulder girdles, fused vertebrae, ribs
Neotetrapoda
Includes Amphibia and all more derived; syn: pentadactyly
Amphibia
Includes Lissamphibia and extinct amphibians; syn: less than or equal to four digits
Lissamphibia
Gymnophiona (caecilians) and Batrachia; syn: short, straight ribs that don’t encircle body, unossified wrist and ankle bones, amphibian papilla
Batrachia
Anura (frogs and toads) and Caudata (salamanders and newts); syn: opercular apparatus, loss of scales
Gymnophiona
ap: tentacle-like sensory organ
Anura
ap: specialized for saltation, vocalization
Caudata
syn: posterior origin of adductor mandibulae externus
Reptilomorpha
Includes Amniota and all more derived; syn: 23454 phalangeal formula
Amniota
Sauropsida and Synapsida; syn: amnion, astragalus ankle bone, 2+ sacral vertebrae
Sauropsida
Testudines (turtles and tortoises) and Diapsida; syn: feet rotated under body
Testudines
syn: carapace and plastron
Diapsida
Lepidosauria and Archosauromorphs; syn: diapsid skulls
Lepidosauria
Sphenodons (tuatara) and Squamata; syn: transverse cloacal slit, thin rodlike columella
Squamata
Includes lizards and snakes; syn: hemipenes
Archosauromorphs
Includes Crocodilians and Dinosaurs (includes Aves/birds); syn: thecodont dentition
Synapsida
Includes Mammalia and all more derived; syn: synapsid skulls
Mammalia
Monotremata and Theria; syn: dentary-squamosal jaw joint, 3 inner ear bones, precise dental occlusion
Monotremata
Platypus and Echidna; ap: reversed triangular pattern of occlusion
Theria
Metatheria (marsupials) and Theria (placentals); syn: tribosphenic molars, viviparity
Metatheria
syn: in-turned angular process on dentary, marsupium
Eutheria
syn: placenta
Basement membrane
thin, noncellular region separating epithelium from underlying connective tissue
Simple epithelium
single layer of cells
Stratified epithelium
numerous cell layers
Pseudostratified epithelium
single layer of cells attached to a basement membrane, but not all cells reach the surface
Squamous epithelium
epithelium with flat surface cells
Cuboidal cells
cells are round or as tall as they are wide
Columnar cells
cells are taller than they are wide
Cilia
motile structures on cells in the uterine tubes, uterus, and conducting tubes of the respiratory system
Microvilli
small, nonmotile projections that cover all absorptive cells in the small intestine and proximal convoluted tubules in kidney
Stereocilia
long, nonmotile, branched microvilli that cover the cells in the epididymis and vas deferens
Mesothelium
simple squamous epithelium that covers the external surfaces of the digestive organs, lungs, and heart
Endothelium
simple squamous epithelium that covers the lumina of the heart chambers, blood vessels, and lymphatic vessels
Simple cuboidal epithelium
lines small excretory ducts
Simple columnar epithelium
covers digestive organs
Pseudostratified columnar eptihelium
lines respiratory passages and lumina of epididymis and vas deferencs
Nonkeratinized epithelium
exhibits live surface cells and covers moist cavities
Keratinized epithelium
exhibits nonliving keratinized surface cells and covers external body surfaces
Stratified cuboidal and columnar epithelium
line larger excretory ducts in pancreas, salivary, amd sweat glands
Transitional epithelium
lines urinary system; changes shape to resemble stratified squamous or cuboidal epithelium depending on contraction
Goblet cells
mucus-secreting, unicellular glands found in the epithelia of the intestines and respiratory passages
Secretory portion
end piece of gland where epithelial cells secrete a product
Ductal portion
epithelium-lined portion of gland through which secretions travel from secretory portion to exterior of gland
Simple exocrine gland
exhibits an unbranched duct
Tubular gland
terminal secretory portion is tube-shaped
Compound exocrine gland
shows repeated branching of ducts
Acinar (alveolar) glands
secretory portions of the gland are flask-shaped
Tubuloacinar glands
glands that exhibit both tubular and acinar secretory portions
Mucous glands
glands that contain cells that produce a viscous secretion that lubricates or protects the inner lining of the organs
Serous glands
glands with cells that produce watery secretions rich in enzymes
Mixed glands
glands that contain a mixture of both mucous and serous secretory cells
Merocrine glands
glands that release their secretion by exocytosis without any loss of cellular components
Holocrine glands
cells are the secretory product
Exocrine glands
glands that secrete products into ducts
Endocrine glands
glands that secrete products into bloodstream
Loose connective tissue
characterized by loose, irregular arrangement of connective fibers and abundant ground substance
Dense connective tissue
contains thicker and more densely packed collagen fibers with fewer cell types and less ground substance
Dense irregular connective tissue
collagen fibers exhibit random and irregular orientation
Dense regular connective tissue
contains densely packed collagen fibers that exhibit regular parallel arrangement
Fibroblasts
active cells that synthesize connective tissue fibers and extracellular ground substance
Fibrocytes
inactive or resting fibroblasts
Adipose cells
store fat
Macrophages/histiocytes
phagocytic cells located in loose connective tissue
Mast cells
spherical cells filled with basophilic granules
Plasma cells
arise from lymphocytes that migrate into the connective tissue
Leukocytes
white blood cells, neutrophils, and eosinophils; defend organism against bacteria and foreign matter
Collagen fibers
tough, thick, fibrous proteins that do not branch; most abundant fibers
Type I collagen fibers
found in dermis of skin, tendons, ligaments, and bone; very strong and resistant to tensile stress
Type II collagen fibers
present in hyaline cartilage and elastic cartilage; provide resistance to pressure
Type III collagen fibers
thin, branching reticular fibers that form supporting meshwork in lymph nodes, spleen, and bone marrow
Type IV collagen fibers
Present in basal lamina of basement membrane where cells attach
Reticular fibers
mainly Type III collagen
Elastic fibers
thin, branching fibers that allow stretch; composed of microfibrils and elastin
Hyaline cartilage
most common type of cartilage; serves as model for bones
Elastic cartilage
similar in appearance to hyaline cartilage except for branching elastic fibers; highly flexible
Fibrocartilage
characterized by large amounts of irregular and dense bundles of course collagen fibers; consists of alternating layers of cartilage and layers of type I collagen fibers
Perichondrium
peripheral layer of vascularized, dense, irregular connective tissue surrounding most hyaline and elastic cartilage
Chondroblasts
produce and maintain cartilage matrix
Chondrocytes
inactive chondroblasts
Hemopoiesis
blood cell formation
Endochondral ossification
temporary hyaline cartilage model calcifies
Periosteum
external connective tissue surrounding bone
Osteoblasts
synthesize bone
Osteocytes
osteoblasts that become surrounded by lacunae
Canalculi
canals in bone that eventually house blood vessels
Endosteum
inner surface of bone
Diaphysis
shaft of long bone
Epiphysis
articular surface of the expanded end of bone
Intramembranous ossification
bone develops from connective tissue mesenchyme
Trabeculae
thin rods, plates, and spines that form spongy bone
Cancellous bone
spongy bone
Lamellae
layers of bone
Osteon
concentric lamellae surrounding a blood vessel, nerve, or other loose connective tissue
Dentition
array of teeth in the jaw
Homodont
similar tooth shape throughout mouth
Polyphyodont
teeth are continually replaced
Acrodont
teeth are attached to top of jaw
Pleurodont
teeth are attached to lingual side of jaw by ligaments
Heterodont
different tooth shapes throughout mouth
Thecodont
teeth are set in sockets
Diphyodont
2 sets of teeth; usually milk and adult teeth
Monophyodont
only a single set of teeth
Canines
conical teeth used for seizing/piercing prey, display, and fighting
Premolars
originally used for puncturing
Molars
originally used for crushing
Tribosphenic molars
unique to mammals; form a mortar and pestle mechanism
Carnassals
In carnivores; upper 4th premolars and lower 1st molars; linearly aligned; designed to shear flesh
Omnivore/Herbivore molars
used to pulverize plants
Hypsodont molars
High-crowned; cementum covers crown
Brachyodont molars
Low-crowned
Bunodont molars
brachyodont molars with rounded cusps specialized for crushing
Selenodont molars
hypsodont molars with elongated, independent cusps
Lophodont molars
hypsodont molars with cusps that blend together to form lophs
Chondrichthyan dentition
homodont, polyphyodont, acrodont
Amphibian dentition
homodont, polyphyodont, pleurodont
Neopterygian fish dentition
homodont, polyphyodont, pleurodont or acrodont; may be distributed throughout mouth and throat
Squamate dentition
acrodont or pleurodont, polyphyodont, homodont or heterodont
Archosaur dentition
Thecodont, polyphyodont, homodont or heterodont
Mammal dentition
diphyodont or monophyodont, homodont or heterodont, thecodont
Lepidotrichia
bony fin rays composed of small tube-shaped segments
Ceratotrichia
fin rays composed of large bundles of collagen
Branchiostegal rays
bony rays near gills that aid in buccal pumping
Apomorphy
Trait not shared by neighboring taxa
Synapomorphy
trait shared by sister taxa; likely from common ancestor
Stapes
Inner ear bone homologous to columella
Malleus
Inner ear bone homologous to articular
Incus
Inner ear bone homologous to quadrate
7 types of blood cells
erythrocytes, platelets, lymphocytes, monocytes, neutrophils, eosinophils, basophils
5 types of white blood cells
lymphocytes, monocytes, neutrophils, eosinophils, basophils
Types of granulocytes
neutrophils, eosinophils, basophils