Essential Vocabulary

Essential Vocabulary

• Notochord – long supporting rod that runs through a chordate’s body just below the nerve cord.

Essential Vocabulary

• Pharyngeal slits – structures in the throat (pharynx) region that develop into gills that are used for gas exchange.

Essential Vocabulary

• Metabolism – all the chemical reactions that occur within an organism.

• Ectothermic - animal that has a variable body temperature and derives its heat from external sources.

Essential Vocabulary

• Endothermic – animals maintain a constant body temperature and is not dependent on the environmental temperature.

Essential Vocabulary

• Oviparous – mammals that produce eggs that mature and hatch after being expelled from the body. The monotremes

Spiny Anteater: Echidnas

Essential Vocabulary

• Ovoviviparous – mammals producing eggs that are hatched within the body, so that the young are born alive but without placental attachment. The Marsupials

Essential Vocabulary

• Viviparous – mammals that have living young rather than eggs. The placental mammals.

Essential Vocabulary

• Embryology – the study of the development of embryos.

• Primates – omnivorous mammals of the order Primates comprising humans, great apes, gibbons, etc.

Essential Vocabulary

• Osmosis – movement of water across a semi-permeable membrane

• Excretion – discharge of waste matter such as urine and sweat through the kidneys and skin.

Evolution of Jaws

Evolution of Jaws, Part 1