Chordates Flashcards
Chordates are _______ and _________.
Deuterostomates, enterocoelous
The endoskeleton permits…
Continuous growth without molting
Predatory abilities are due to a ________, ________, and ________.
Light flexible skeleton, highly specialized brain, paired appendages
The flexible rod of tightly compacted cellular tissues (cartilage) in at least some stage of life is the…
Notochord
The notochord is the ______ part of the endoskeleton to appear in the _______.
First, embryo
The notochord is replaced by _________, but it’s remnants persist as _______ between ________.
Bony segments, cartilage pads, bones
The tubular nerve cord is _____ to the notochord and extends from the _______.
Dorsal, brain.
_________ evolved originally as a filter feeding mechansim but later adapted to form internal gills.
Pharyngeal pouches/slits
The ______ produces mucus to aid in filter feeding and is similar to the _______ of vertebrates.
Endostyle, thyroid
The ___________ aides in propulsion and is similar to the ______ in humans.
Post-anal tail, coccyx (tail bone)
Urochordate literally means “__________”, that of which is only found in the _____ stage.
Tail chordates, larval
Urochordates with a tunic or an outer coat are called…
Tunicates
“Sea squirts” are known for their ability to _______ via the incurrent and excurrent canals for _________.
Move water, filter feeding.
The metamorphosis of tunicates results in a free swimming larvae turning into a ______ adult that had lost its _____________.
Sessile, notochord
The incurrent canal and excurrent canal in a tunicate larvae turns into the _______ and ________. These structures also appear as mainstays in _________.
Mouth, atrial siphon, cephalochordates
The atrium is the space between the ________ and ________.
Outer tunic, body
In tunicates, water that leaves through the excurrent siphon carries _________ and _________.
Digestive waste, gametes
Urochordates use __________ feeding, whereas Chephalochordates use __________. Both use ________.
Extracellular, intracellular, phagocytosis
Cephalochordates have a closed circulatory system, but no…
Heart
Cephalochordates have _______ muscles, resulting in…
Segmented, metamerism
