Mean arterial pressure is not the simple mathematical average of diastolic and systolic pressures.

This is because a greater fraction of each cardiac cycle is spent in diastole than in systole.

TLS Online TPP Program

#Id: 9578

#Unit 11. Evolution and Behavior

Ordovician - Primitive plants and fungi colonize land, first jawless vertebrates,  Mass extinction at end of period

TLS Online TPP Program

#Id: 9579

#Unit 11. Evolution and Behavior

Silurian - Origin of jawed fishes and arthropods, Invasion of land by primitive land plants

TLS Online TPP Program

#Id: 9580

#Unit 11. Evolution and Behavior

Devonian - First amphibian and first seed plant appear, and insects Mass extinction late in period

TLS Online TPP Program

#Id: 9581

#Unit 11. Evolution and Behavior

Carboniferous - First reptile

TLS Online TPP Program

#Id: 9582

#Unit 11. Evolution and Behavior

Permian - Major mass extinctions, amphibians decline

TLS Online TPP Program

#Id: 9583

#Unit 11. Evolution and Behavior

Triassic - First dinosaurs and mammal, Mass extinction near end of period