hailey Flashcards
Vertebrates
Vertebrates comprise all species of animals within the subphylum Vertebrata, including all mammals, birds, reptiles, amphibians, and fish.
. Invertebrates
Invertebrates are animals that neither possess nor develop a vertebral column, derived from the notochord.
Consumer
consumers constitute the upper trophic levels.
Ganglion
a small cystic tumor connected either with a joint membrane or tendon sheath.
. Gut
The gastrointestinal tract is the tract or passageway of the digestive system that leads from the mouth to the anus.
Coelom
the usually epithelium-lined space between the body wall and the digestive tract of metazoans above the lower worms.
. Bilateral Symmetry
symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so that only one plane can divide the individual into essentially identical halves.
Radial Symmetry
symmetry around a central axis, as in a starfish or a tulip flower.
. Asymmetry
The lack or absence of symmetry.
Sponges
Any of numerous aquatic, chiefly marine invertebrate animals of the phylum Porifera.
Cnidarians
an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.
Flatworms
he flatworms, flat worms, Platyhelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.
Roundworms
The nematodes or roundworms constitute the phylum Nematoda, with plant-parasitic nematodes also known as eelworms.
Mollusks
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda.
Open circulatory system
Open circulatory systems are systems where blood, rather than being sealed tight in arteries and veins.
Closed circulatory system
In a closed circulatory system, blood is contained inside blood vessels, circulating unidirectionally from the heart around the systemic circulatory route, then returning to the heart again.
Annelid worms
The annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.
. Exoskeleton
exoskeleton, rigid or articulated envelope that supports and protects the soft tissues of certain animals.
Compound eye
A compound eye is a visual organ found in arthropods such as insects and crustaceans. I
Antenna
Antennas are required by any radio receiver or transmitter to couple its electrical connection to the electromagnetic field.
Metamorphosis
metamorphosis, in biology, striking change of form or structure in an individual after hatching or birth.
Endoskeleton
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
Water vascular system
a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels
