Chordata Protochordata

Fish Entire LS Fish Head Region TS Fish Gill Region TS Fish Trunk Region TS Fish Tail Region TS Fish Oesophagus TS Fish Stomach TS Fish Intestine TS Fish Rectum TS Fish Liver TS Fish Pancreas TS Fish Skin VS Fish Kidney TS Fish Ovary TS Fish Testis TS Fish Gill TS, VS Fish Air Bladder TS Fish Olfactory Rosset TS Fish Spinal Cord TS Fish Brain LS Fish Brain TS through Telencephalon Fish Brain TS through Diencephalon Fish Brain TS through Mesencephalon Fish Brain TS through Metencephalon Fish Brain TS through Myelencephalon

Unio Shell Ground Thin Unio Gill TS Unio Foot TS Unio Behind Foot Region TS Unio Body and Gill TS Glochidium Larva WM Ospheridium of Pila CS Redula of Pila CS Redula of Pila WM Sepia TS Through Eye Region Sepia Arm CS

Hydra plain WM Hydra budding WM Hydra with gonads WM Hydra Body TS Hydra Body LS Hydra Ovary Region TS Hydra Testis Region TS Obelia Colony Sea Anemone TS Sea Anemone LS Pcnnaria WM Bougain Villea WM Tubularia WM Sertularia WM

Earthworm Buccal Region TS Earthworm Pharynx Region TS Earthworm Spermathica Region TS Earthworm Oesophagus Region TS Earthworm Seminal Vesicle Region TS Earthworm Prostate Gland Region TS Earthworm Testis Region TS Earthworm Intestinal Region TS Earthworm Gizard Region TS Earthworm Clitellum Region TS Earthworm Typhlosolar Region TS Earthworm Anterior Region Sag. Sec. Earthworm Ovary WM Earthworm Setae WM Earthworm Septal Nephridium WM Nereis Parapodium WM Heteronereis Parapodium WM Nereis Body TS Leech Crop Region TS Leech Stomach Region TS Leech Intestinal Region TS Leech post. Sucker TS Leech Ant. Sucker TS