The Fetal Period of Prenatal Development Lasts from the Ninth

question 270

True/False

The fetal period of prenatal development lasts from the ninth week until birth.

---

Definitions:

Regulation of Respiration

The processes involved in controlling the rate and depth of breathing.

Hemoglobin

A protein in red blood cells that carries oxygen from the lungs to the rest of the body and returns carbon dioxide back to the lungs to be exhaled.

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air and is absorbed by plants in photosynthesis.

Bicarbonate Ions

Ions that act as a buffer in bodily fluids to maintain pH balance and are involved in the carbon dioxide transport and delivery system.