How can we help?

You can also find more resources in our Help Center.

Mammals

STUDY
PLAY
therapsids
an extinct group of reptiles from which mammals evolved
mammary glands
glands that make a nutritious fluid for embryos called milk
incisors
teeth used to cut food
canines
teeth used to stab and slice teeth
molars
teeth used to grind up food
milk teeth
a young mammal's first small teeth
diaphragm
a large muscle in mammals that helps bring air into the lungs
monotremes
mammals that lay eggs
marsipials
mammals with pouches in which the young go in for protection
placental mammals
Mammals that have embryos that develop in mother's uterus until its body systems can function independently
gestation period
time in which embryo develops within the mother