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Lecture 17 (MT2)
Protostomes and some deuterostomes
26
Biology
Undergraduate 1
03/21/2013

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Term
Arthropods have a/an ___ circulatory system and their blood is called hemolymph. They are ___, based on how their mesoderm is positioned. They have multiple hearts and melanin tissue to scab wounds.
Definition

open

 

coelomates

Term
Arthropods can be aquatic or terrestrial. For respiratory systems, aquatic ones have ___ organs and terrestrial ones have a ___.
Definition

gill

 

trachaea

Term
Arthropods have a hard exoskeleton with segmentation. They have undergone ___, meaning they have fusion of segments into specialized parts. These parts in insects are ___ (three parts) and in crustaceans are ___ (three parts).
Definition

tagmatization

 

head, thorax, abdomen

 

cephalon, thorax, abdomen

Term
Insects belong to the ___, within the ecdysozoans.
Definition
hexapod
Term
A crustacean has three main segments: the ___ (three parts). The ___ and ___ are sometimes combined and called the ___.
Definition

cephalon, thorax, abdomen

 

cephalon, thorax

 

cephalothorax

Term
Many crustaceans contain ___ segments in their abdomen segment, containg ___. These are branched appendages.
Definition

six

 

swimmerets

Term
The tail of a crustacean is called the ___.
Definition
telson
Term
Barnacles are part of the subphylum ___ , which are ___, which are triploblasts (bilaterians), which are eumatazoans. They are closely related to ___.
Definition

crustaceans

 

protostomes

 

shrimp

 

 

Term
Chelicerata is a subphylum of ___, which are ecdysozoans, which are protostomes, which are triploblasts (bilaterians), which are eumatazoans. Their anterior is called a ___, and is made up of six fused segments and appendages. Their posterior is called a ___, which may contain appendages. The chelicerae is a ___. Spiders are an example of chelicerata.
Definition

arthropods

 

prosoma

 

opisthosoma

 

fang-like mouth

Term
All legs on insects sprout from the ___ segment.
Definition
thorax
Term
Exopterygote is when ___.
Definition
wings develop outside of the body
Term
___ development is when larva are miniature adults. ___ development is when larva are nymphs, or miniature adult-like BUT missing some features. An example of holometabolous development is when caterpillars molt and turn into butterflies.
Definition

Direct (holometabolous)

 

Indirect (hemimetabolous) 

 

 

Term
Insects can contribute a lot to their success on land. They have a hard ___, a ___ for breathing and ___ tubulues to concentrate waste and preserve water.
Definition

exoskeleton

 

trachea

 

Malpighian

Term
Ectroprocts, Brachiopods and Phoronids are lophotrochozoans, which are protostomes, which are tripoblasts (bilaterians), which are eumetazoans, have a ___ feeding apparatus.
Definition
lophophore
Term
Annelids (like worms) are ___, which are protostomes, which are triploblasts (bilaterians), which are eumetazoans.
Definition
lophotrochozoans
Term
Some mollusks, annelids and ribbon worms have swimming (planktonic) ___ larvae. It is surrounded by several bands of cilia.
Definition
trochophore
Term
Mollusks have three basic parts: the ___.
Definition
the foot, mantle and visceral mass
Term
In mollusks, the shell is secreted by the ___.
Definition
mantle
Term
Mollusks are a phylum and a member of the ___ group, which are protostomes, which are triploblasts (bilaterians), which are eumetazoans. They have a complete, one way guy. They have a ___, which is a chitinous ribbon with rows of teeth for feeding.
Definition

lophotrochozoans

 

radula

Term
The phylum ___ has four classes: polyplacophora (chitons), gastropoda (snails, slugs), bivalvia (clams, oysters) and cephalopoda (squid, octopus). They are lophotrocozoans, which are protostomes.
Definition
mollusk
Term
Gastropods are a class under the ___ phylum. They include slugs and snails. They developed a ___, which acts as a lung, in order to breath on land.
Definition

mollusk

 

mantle cavity

Term
Deuterostomes are defined by the fact that the blastula develops into the ___ during gastrulation, and the mouth develops second.
Definition
anus
Term
Deuterostomes share three features: ___.
Definition

tripoblastic

 

internal skeleton

 

coelomates

Term
Echinoderms include starfish have ___ symmetry, often pentameral symmetry, as adults. However, their larva is often ___ symmetric. This means that echinoderms have ___ (hemimetabolous) development. The larvae may be bilteral, because the common ancestor to deuterostomes was bilateral.
Definition

radial

 

bilaterally

Term
Echinoderms have many "inventions." For one, they have hollow, muscular tube feet on their oral side with suckers. It is used for ___ and it part of the ___ system. The ___ system is part of the coelom and contains sea water. Water intake into this system is controlled by a mesh-like structure called a madreporite.
Definition

locomotion

 

water vascular

 

water vascular

Term
Echinoderms have two stomachs. The ___ stomach can be everted outside the body, where it uses digestive enzymes to break down the food. The food is then brought inside where the ___ stomach completes digestion. They also have internal dermal endoskeletons (internal). They are composed of plates, called ___. In sea urchins and sand dollars, this is called a test.
Definition

cardiac

 

pyloric

 

ossicles

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