Untitled Flashcards Set

Term: "Ectothermic organism"
Definition: "An organism that relies on external sources of heat to regulate body temperature."

Term: "Hermaphroditic"
Definition: "An organism that has both male and female reproductive organs."

Term: "Metamorphosis"
Definition: "A biological process in which an animal undergoes a drastic change in form from larva to adult."

Term: "Bilateral symmetry"
Definition: "A body plan where the left and right halves of an organism are mirror images."

Term: "Radial symmetry"
Definition: "A body plan where body parts are arranged around a central axis."

Term: "Endoskeleton"
Definition: "An internal skeleton that provides support and protection to an organism."

Term: "Exoskeleton"
Definition: "A hard outer structure that provides support and protection to an organism."

Term: "Cnidocytes"
Definition: "Specialized stinging cells found in cnidarians used for defense and capturing prey."

Term: "Gastrovascular cavity"
Definition: "A central cavity in certain animals that functions in both digestion and circulation."

Term: "Nematocyst"
Definition: "A specialized cell in cnidarians containing a barbed or venomous coiled thread that can be projected for capturing prey or defense."

Term: "Cephalization"
Definition: "The concentration of nervous tissue and sensory organs at the front of an organism’s body."

Term: "Acoelomate"
Definition: "An animal that lacks a body cavity between the digestive tract and outer body wall."

Term: "Pseudocoelomate"
Definition: "An animal with a body cavity that is not fully lined with mesoderm."

Term: "Coelomate"
Definition: "An animal that has a true body cavity completely lined with mesoderm."

Term: "Open circulatory system"
Definition: "A circulatory system in which blood is pumped into open spaces and directly bathes organs."

Term: "Closed circulatory system"
Definition: "A circulatory system in which blood is contained within vessels and pumped through a network of arteries and veins."

Term: "Ganglia"
Definition: "Clusters of nerve cells that function as a simple brain in some invertebrates."

Term: "Regeneration"
Definition: "The ability of an organism to regrow lost body parts."

Term: "Water vascular system"
Definition: "A system of fluid-filled canals in echinoderms used for movement, feeding, and respiration."

Term: "Tube feet"
Definition: "Small, flexible, hollow appendages used by echinoderms for movement and feeding."

Term: "Mantle"
Definition: "A layer of tissue in mollusks that secretes the shell and aids in respiration and excretion."

Term: "Radula"
Definition: "A tongue-like organ in mollusks used for scraping or cutting food before ingestion."

Term: "Nephridia"
Definition: "Excretory organs in some invertebrates that filter waste from body fluids."

Term: "Setae"
Definition: "Bristle-like structures on annelids that aid in movement."

Term: "Parapodia"
Definition: "Paired, fleshy appendages found in some annelids used for locomotion or respiration."

Term: "Molting"
Definition: "The process of shedding an exoskeleton or outer layer to allow for growth in arthropods and some other animals."

Term: "Tracheal system"
Definition: "A network of tubes in arthropods that allows for gas exchange."

Term: "Book lungs"
Definition: "Respiratory structures in arachnids consisting of stacked, plate-like tissues for gas exchange."

Term: "Malpighian tubules"
Definition: "Excretory structures in insects and some arachnids that remove waste from the blood."

Term: "Incomplete metamorphosis"
Definition: "A type of development in insects where the young resemble the adult but lack full adult structures."

Term: "Complete metamorphosis"
Definition: "A type of insect development that includes four stages: egg, larva, pupa, and adult."

Term: "Chelipeds"
Definition: "Clawed appendages in crustaceans used for defense and capturing food."

Term: "Pedipalps"
Definition: "A pair of appendages near the mouth of arachnids used for sensing and manipulating food."

Term: "Spiracles"
Definition: "Small openings in the body of an insect that connect to the tracheal system for gas exchange."