Credited with 1st notions on embryology

Father of modern physiology and medicine

Hypothesized that all animals originate from an ehg

Italian physician and biologist drew 1st micrographs of developmental embryos

Visualized epigenesis of embryonic germ layers

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

Described pharyngeal arches skull formation

Early development of representatives vertebrates, processes and principles

Gills, scales, fins

Feather, wings

Scale and coold blooded

Mammary glands and warm blooded with hair

Backbones, notochord, pharyngeal, slits

Levels of biological organization

Gametes (sex cells)

Egg+sperm

Changes, process, advancement

Individual

Evolutionary process

Study of cell

Study of tissues

Study of organs

Study of systems

Study of population, community, and ecosystem

Observation biology and experimental manipulations

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

3 germ layers

Chordata, echinodermata, porifera

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

Spiral cleavage

Determinate cleavage

Schizocoelus coelum formation- the coelum develops from splits in mesoderm

The blastopore becomes the mouth

Radial cleavage

Indeterminate cleavage

Enterocoelus coelum develops from outpocketings of the mesoderm

The blastopore becomes the anus