Test #1 Flashcards
(32 cards)
tissue
- cells that function together
- none; sponges
- diploblast; two embryonic cell layers (ectoderm and endoderm), jellyfish
- triploblast; three embryonic cell layers, flatworms
cleavage
- first few rounds of mitosis
- protostome; spiral and determinate, cells that don’t “line up”, cells become specialized
- deuterstome; radial and immdetermiate, edges line up, not specialized yet
Cambrian Explosion
- 535-525 million years ago
- drastic increase in number of species
- hard body coverings which make fossils
Cambrian Explosion
- 535-525 million years ago
- drastic increase in number of species
- hard body coverings which make fossils
- may have increase in predator-prey relationships
Radial Symmetry
- regardless of a cut on an organism, two halves will always reflect each other
- jellyfish
Bilateral Symmetry
- one central axis where a cut will have two halves that reflect each other
- human, earthworm
Cephalization
toward head, anterior end, forms head and brain during development
Ectoderm
organisms that rely on external environment to regulate body temperature
Endoderm
organisms that produce heat via internal metabolic processes
Ectodermic
organisms that rely on external environment to regulate body temperature
Endodermic
organisms that produce heat via internal metabolic processes
Diploblastic
two embryonic cell layers (ectoderm and endoderm), jellyfish
Diploblastic
two embryonic cell layers (ectoderm and endoderm), jellyfish
Triploblast
three embryonic cell layers, flatworms
Coelom
- body cavity
- have to be triploblastic
- acoalomates; no presence of a coelom, no body cavity between wall and internal canal, flatworm
- coelomates; body cavity present
Determinate Cleavage
- does not have the capacity to develop into a complete embryo
- results in the developmental fate of the cells being set early in the embryo development
- protostomes
Intermediate Cleavage
- ability to develop into a complete embryo
- developmental fate is not determined in the early embryonic stage
Blastopore
- hole/opening
- protostome=mouth develops first
- deuterstome=anus develops first
anatomy
structure; how it looks and what it is made of
physiology
function; what it does and how it does
Interstitial Fluid
solution that bathes and surrounds the tissue cells of multicellular animals
Epithelial Tissue
- lines organs
- barrier
- simple squamous
Connective Tissue
- holds tissues and organs together and in place
- support
- blood
Muscle Tissue
- body movement
- cardiac
