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Animals
BIO Lab Exam 3
Question | Answer |
---|---|
Characteristics of animals | multicellular eukaryotes, heterotrophic, reproduce sexually, embryological stages, motile (can move), and complex tissues organized into organ systems |
Tissues | Group of specialized cells performing the same function |
What is function determined by? | Structure |
What is the connection between structure and function? | Central to the notion of adaption |
What is the result of adaption? | Evolutionary changes in the prevalence of traits that are uniquely adapting to a particular environment of set challenges |
Radial symmetry | Parts radiate from the central, so any slice through the central axis divides into mirror image's |
Bilateral symmetry | Only one slice can divide left and right slides into mirror-image halves |
What does bilateral symmetry allow? | The concentration of sensory tissues at the front end of an organism allowing for more complex movement and interaction with the surroundings |
Types of circulation | Open circulatory system and closed circulatory system |
Sponge structure | Food particles are trapped by and ingested into individual cells lining the central canal. Sponges lack true tissues through they are organized. |
Digestion in animals | Incomplete digestive system and complete digestive system |
Support in animals | endoskeleton, exoskeleton, and hydrostatic skeleton |
Endoskeleton | bones inside the human hand |
Exoskeleton | the shell outside a snail |
Hydrostatic skeleton | water pressure inside an earthworm |
Movement in animals | Animals with an exoskeleton and animals with an endoskeleton (muscles) |
Hydrostatic movement | longitudinal muscle relaxed (extended), circular muscle contracted, circular muscle relaxed, and longitudinal muscle contracted |