Examlex
Identify and state the historical significance of the following:
-Tariff of Abominations
Eutherian Mammal
Mammals that are characterized by a complex placenta that allows a long gestation period within the uterus, leading to the birth of relatively well-developed offspring.
Insectivora
An obsolete term for an order of mammals, now split into various orders, that are characterized by feeding on insects and other small invertebrates.
Closed Circulatory System
A circulatory system where blood is contained within vessels and is separated from bodily tissues, as seen in vertebrates.
Dorsal Heart
A dorsal heart is a heart that is located towards the back (dorsal) side of an organism, contrasting with the ventral placement seen in humans.