Chapter 25
What is an invertebrate?
An animal that doesn't have a backbone.
What does the setae help a segmented worm do?
The setae help segmented worms move by providing a way to anchor their bodies in the soil so each segment can move the animal along.
Which type of eye has many lenses?
A compound eye.
What is the hydraulic system that operates under water pressure?
Water vascular system
What kingdom do squid belong to?
Animalia
What is a blastula?
a cell covered, fluid filled ball
What is the name of the system where blood moves through the body enclosed entirely in a series of blood vessels?
Closed Circulatory System
What is a Cephalothorax? (sef-uh-loh-thawr-uh-seez)
The head and thorax fused together for protection.
What is the name of the pouches in a chordate embryo that are paired openings located in the pharynx, behind the mouth?
Pharyngeal Pouches
How many hearts do squid have?
3
What is it called when an organism is permanently attached to a surface?
Sessile
What is an open circulatory system?
The blood moves through vessels and into open spaces around the body organs. This exposes body organs directly to blood that contains nutrients and oxygen, and removes metabolic wastes.
What is the name of the form of asexual reproduction from an ovum without fertilization, especially as a normal process in some invertebrates and lower plants.
Parthenogenesis
What are tub feet?
What does a squid use to tear apart its food?
Its beak
Name 2 of the 3 types of symmetry.
Radial, Bilateral, asymmetry
What does the gizzard do?
In the gizzard, a muscular sac and hard particles help grind soil and food before they pass into the intestine.
What are pedipalps?
The second pair of appendages, adapted for handling food and for sensing.
What is the notochord?
a long semirigid, rodlike structure located between the digestive system and the dorsal hollow nerve cord.
What is the name of the tonguelike organ with rows of teeth in a squid?
Radula
Credit given if you said Sarlacc which is the sand creature from Star Wars. :)~
Name the 3 types of cells in the blastula.
Mesoderm, Ectoderm, Endoderm
What is nephridia?
What is a nymph?
An insect or another arthropod that hatches from an egg, has the same general appearance as an adult but is smaller
Name 1 thing the pedicellariae is used for?
Protection and cleaning the surface of its body.
How many arms does a squid have?
8 arms
2 tentacles