animal phylum assign

animal phylum assign - Identify a class within phylum...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Iowa State University Biology 211 Section 2 Digestive and Circulatory Systems 1. Question: Distinguish between complete and incomplete digestive systems. Indicate one phylum that has incomplete digestive systems and one phylum that has complete digestive systems. (3pts) Answer: An incomplete digestive system, such as phylum Cnidaria, is an animal with an incomplete digestive system because, unlike complete digestive systems, an incomplete digestive system has no anal opening! A complete digestive system, Phylum Mollusca, has both a mouth and an anus! 2. Question:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Identify a class within phylum mollusca that possesses an open circulatory system and a class within phylum mollusca that possesses a closed circulatory system. What are the distinctions between open and closed circulatory systems? (3pts) Answer: Class Bivalvia has an open circulatory system. Animals with open circulatory systems have no capillaries. Class Cephalopoda has a closed circulatory system. In closed circulatory systems the blood travels from the heart to the capillary beds and drains back to the heart through the veins....
View Full Document

This note was uploaded on 09/14/2011 for the course BIO 212 taught by Professor Mayfield during the Spring '10 term at Iowa State.

Page1 / 2

animal phylum assign - Identify a class within phylum...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online