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an emergent
website design
by
peter jay stein, md, ma
atmosphere
asthenosphere
lithosphere
regolith
biosphere
hydrosphere
This 54 page synopsis of the evolution
of the Earth, the origin and progression of life, and the
emergence of humans as descendants of the hominin lineage, divides the last 4.57 billion years into progressively overlapping, imagistic, time segments, to outline our place in biological existence.
magnetosphere
ionosphere
DOMAIN: Eukarya
KINGDOM: Animalia
SEVENTEEN
Emergent Chordates II
adapted from Biology 182 Lab 40b Phylum Chordata (youtube); & Biology (2002)
ancestral colonial choanoflagellate
eumetazoa
(true tissues)
parazoa
(not true tissues, but single cells, forming a multi-cellular colony, i.e., sponges (porifera))
radiata
bilateria
acoelomates (no body cavity)
coelomates
(body cavity enclosed by mesoderm)
pseudo-coelomates
(body cavity not enclosed by mesoderm)
protostomes
deuterostomes
PHYLUM:
Chordata
hemichordata
echinodermata
(arthropods)
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