Chordata, echinodermata, porifera

Study of organs

Observation biology and experimental manipulations

Study of tissues

The blastopore becomes the anus

Visualized epigenesis of embryonic germ layers

Individual

Backbones, notochord, pharyngeal, slits

3 germ layers

Described pharyngeal arches skull formation

Italian physician and biologist drew 1st micrographs of developmental embryos

Levels of biological organization

Scale and coold blooded

Indeterminate cleavage

Gametes (sex cells)

Evolutionary process

Determinate cleavage

Radial cleavage

Described notochord, discovered mammalian egg, proposed 4 laws of development

Study of systems

Egg+sperm

Arthropoda, nematoda, tardigrada, prispuluda, mollusca, annelida, brachiopoda, platyhelmintha, cnidaria

Gills, scales, fins

Credited with 1st notions on embryology

Study of cell

Spiral cleavage

Hypothesized that all animals originate from an ehg

Changes, process, advancement

Expands embryological studies using molecular techniques and use genetic approaches to study model systems

Feather, wings

Father of modern physiology and medicine

Early development of representatives vertebrates, processes and principles

Study of population, community, and ecosystem

Enterocoelus coelum develops from outpocketings of the mesoderm

The blastopore becomes the mouth

Schizocoelus coelum formation- the coelum develops from splits in mesoderm

Mammary glands and warm blooded with hair