L6 Protostomia/Deutrostoma & lophotrochozoa

What are diploblastic body plans made of?

Endoderm

Non-living layer

Ectoderm

What are triploblastic body plans made of?

Endoderm

Mesoderm

Ectoderm

What are the three types of triploblastic body plans?

Acoelomate

Pseudocolomate

Coelomate

What is the funtion of a acoelomate body plan?

Support diffusion for nutrient transport

Simple transport

Flattened shape

What is the function for a pseudocoelomate body plan?

Hydrostatic skeleton - fluid pressure supports the bodys shape

Lack vascular circulatory system

Can have organs

What is the function for a coelomate body plan?

Greater physiological complexity

Structural support

Coelomic fluid protects internal organs

Hydrostatic skeleton

Coelomic fluid acts as medium for circulating nutrients

What are the four phyla apart of deuterostomia?

Xenoturbellida

Echinodermata

Hemichordata

Chordata

What are the characteristics of a lophotrochozoan?

A lochophore (ciliated feeding tentacles) and/or trochophore larvae (ciliated band)

What are the key characteristics of platyhelmenthes

Triploblastic, acoelomate, bilaterial

All lack specialized circulatory and respiratory systems

Often hermaphroditic

Incomplete guts

What organisation do platyhelmenthes have?

tissue-organ/organ-system organisation

What kind of nervous system do platyhelmenthes have?

Anterior ganglia and longitudinal nerve cords, connected by lateral nerve cords

Where are sense organs in platyhelmentes?

Anterior end

What are the main classes in platyhelmenthes?

Turbellaria

Trematoda

Monogenea

Cestoda

What are the characteristics of turbellaria?

Mostly free living

Ciliated ventral surface

Flame cells for excretion

What is the function of flame cells?

Function like a primitive kidney to remove waste materials

Are all trematodes parasitic?

Yes and they have complex life cycles

What do trematodes have for attachment

Suckers and hooks

What kind of parasites are monoglea and what are their typical hosts?

External on fish gills and scales

What body type do cestodes have?

Long, flat, tape-like bodies

What is the function of scolex

attachment

How do cestodes get nutrients?

Absrob nutriens through microtriches on tegument

What kind of life cycle do cestodes have?

Complex