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ZOO chapter 1

QuestionAnswer
The study of the structure and form of an organism Morphology
Hollow ball of cells Blastula
Indent that forms on a blastula Blastopore
Blastopore becomes mouth Protostome
Blastopore becomes anus Deuterostome
Divides equally in one direction Bilateral symmetry
Divides equally in many directions Radial symmetry
Eukaryotic, multicellular, DNA, heterotrophic, motile, reproduce, and specialization What makes an animal?
coelom Body cavity
Immature young looks different than adult Indirect development
Immature young are smaller versions of adults Direct development
Blood is enclosed in vessels to transport oxygen and nutrients throughout the body Closed circulatory system
Blood pools in body to transport oxygen and nutrients Open circulatory system
System where nutrients and oxygen are transported around the body Circulatory
Having a ball of nerves towards the anterior end of the body Cephalization
1 of 3 cell layers in an embryo from which body systems develop Germ layer
Middle germ layer Mesoderm
Outside body covering system— fur, scales, etc— prevents heat and water loss Integumentary
Dorsal Top/back
Ventral Bottom/belly
Anterior Towards head
Types of symmetry Asymmetric, bilateral, and radial
Handled by digestive system, the remains after nutrients are absorbed from broken down food, called feces Digestive waste
Handled by excretory system, made by body cells when proteins are broken down, includes urea, Uric acid, and ammonia nitrogen waste
Nitrogen waste from most to least toxic Ammonia, urea, uric acid
3 germ layers Ectoderm, mesoderm, endoderm
Has endoderm, mesoderm, and ectoderm but no body cavity Acoelom
Has body cavity with mesoderm lining the body wall but not around the gut Pseudocoelom
Has body cavity lined on BOTH sides by mesoderm Eucoelom
Provides space for internal organs, can act as hydrostatic skeleton, can transport nutrients in an open-circulatory organisms What does a coelom do?
Digestive muscles and body can move independently from each other advantages of a eucoelom
Created by: Odamron
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