Lab 3 - Intro to Animals Flashcards
What are four directions of organisms?
Dorsal (back), ventral (belly), cranial (head or anterior), and caudal (tail or posterior
What part of the animal is dorsal?
the back
What part of the animal is ventral?
belly
What part of the animal is cranial?
head (anterior)
What part of the animal is caudal?
tail end (posterior)
What are some characteristics of animals?
Eukaryotic, multicellular, heterotrophic, complex
What are the levels of organization?
organelle, cellular, tissue, organ, organ system
What are the three germ layers?
Ectoderm, mesoderm, and endoderm
What is an ectoderm?
outside layer
What is a mesoderm?
middle layer
What is an endoderm?
inner layer
Diploblastic
two germ layers - possess ectoderm and endoderm but no mesoderm
Triploblastic
three germ layers - possess all three germ layers
What are the three types of symmetry?
asymmetry, radial, and bilateral
What is asymmetry?
no plane of symmetry
What is radial symmetry?
many planes of symmetry
Are radial organisms diploblastic or triploblastic?
diploblastic
What is bilateral symmetry?
one plane of symmetry
Are bilateral organisms diploblastic or triploblastic?
triploblastic
What are the three types of body cavities?
Acoelomate, pseudocoelomate, and coelomate
Acoelomate
no body cavity
Pseudocoelomate
“false” body cavity with no lining
Coelomate
full lined body cavity
What are the three types of skeletal systems?
Hydrostatic, exoskeleton, and endoskeleton
