Placental mammals

placental mammals

1. Placental Mammals Chapter-6 Section-3

2. Objectives What is placental mammal? Explain the gestation period. Give an example of each type of placental mammal.

3. Lets watch a video.

4. Placental mammals Placental mammal is a mammal whose embryos develop inside mother's body. The embryo grow in an organ called the uterus. Gestation period in mammals : the length of time between fertilization and birth. Elephants need 23 months! Mice need only a few weeks! Human need 9 months.

5. Placenta An organ called placenta attaches embryo to the uterus. Placenta carries oxygen and food from the mother’s blood to the embryo and carries wastes away from the embryo.

6. Anteaters, armadillos, and sloths

7. Insectivores moles, hedgehogs

8. Rodents squirrels chinchilla porcupine

9. Rodents The capybara of south America is the largest rodent in the world.

10. Rabbits and hares

11. Homework Section review Page 119 Homework For next week

12. Next lesson Conti…on Other types of Placental Mammals