Amniotes

Bio 510- Final

Amniotes

Amniotic egg that is desiccation-resistant

Positive pressure pump/ventilation

The process by which fish and amphibians bring gas or water in mouth and puts under pressure for oxygen uptake and exchange.

Negative pressure pump/ventilation

The process by which reptiles, birds, and mammals use lung for oxygen uptake and exchange.

Amnion

Shock absorbing bag of fluid around embryo

Allantois

Grows out of posterior end of gut; gut and kidney waste; bladder formed by cells from allantois

Chorion

Surrounds eggs that eventually fuses with allantois to help O2 exchange

Yolk

Mother invests fat at her expense

Anapsid

Without hole or opening

Apsid

With hole or opening

Synapsid

Skull with single pair of temporal openings

Diapsid

Skull with 2 pairs of temporal openings

Gastralia

Modified boney scales that have moved inside that connect to ribs and muscles of belly to expand and contract size of abdominal cavity.