Animals Prt 2 Flashcards
Flat work digestive system
One opening. Allows food the be ingested and torn into small pieces. (Tapeworms exception)
Removal of wastes
Flatworms circulatory system
Diffusion for gas transport
Flatworm nervous system
Eyespot can distinguish light from dark
Flatworm- planarian
Head is bluntly arrow shaped. Has AURICLES ocated at side of head. Function as sense organs.
2 light sensitive eye spots
Tapeworm
Parasitic. Lacks digestive system. Absorbs food directly through body walls.
Contains hooks and suckers. Attached to intestine of host by front region
Proglittids on tapeworm.
Segmented stuctures that contain male and female reproductive organs
Roundworm- nematode
Phylum- nematoda
Bilateral symmetry Pseudocoelomate Protostome Parasitic Reproduce sexually
Echinoderm
Phylum- Echinodermata
Deuterostome
Coelomate
Bilateral symmetry
Starfish.
Capable of regeneration
Tube feet
Tiny cylindrical projections at lower surface of the body of echinoderm.
Used for locomotion, respiration and captures food
Echinoderm water vascular system.
Water enters though opening madreporite. Water is conducted through the radical canal until it reaches the tube feed.
Ampulla
Muscular squeeze bulb that controls tube foot. The contraction forces water into the tube foot, causing it to extend
Chordate
Phylum- chordata
Bilateral symmetry
Deuterostome
Coelomate
Nerve cord in chordate
Hollow tube that lies above or behind the digestive tract of the body.
Nerve chord develops thickening at its top region that becomes a brain during embryonic development
Notochord
A stiff flexible rod. Located between digestive tract and nerve cord and extends the length of the body.
Provides support for the body and an attachment site for the muscle.
Present only during early stages of development and disappears as the vertebral column develops
Pharyngeal pouches
Located at pharynx. Cavity behind the mouth. May form functional opening for gills or lungs.
