Chapter 30 Mammals Section 1: Mammalian Characteristics Section 2: Diversity of Mammals

Hair and Mammary Glands Chapter 30 Mammals 30.1 Mammalian Characteristics Hair and Mammary Glands Two characteristics that distinguish members of class Mammalia from other vertebrate animals are hair and mammary glands.

Functions of Hair Insulation Camouflage Sensory devices Waterproofing Chapter 30 Mammals 30.1 Mammalian Characteristics Functions of Hair Insulation Camouflage Sensory devices Waterproofing Signaling Defense

Other Characteristics Chapter 30 Mammals 30.1 Mammalian Characteristics Other Characteristics Endothermy Source of body heat is internal. Heat is produced by a high metabolic rate. Body temperature is regulated by internal feedback mechanisms.

Chapter 30 Mammals 30.1 Mammalian Characteristics Feeding and Digestion Daily intake of food is used to generate heat to maintain a constant body temperature.

30.1 Mammalian Characteristics Chapter 30 Mammals 30.1 Mammalian Characteristics

Trophic Categories Insectivores Herbivores Carnivores Omnivores Chapter 30 Mammals 30.1 Mammalian Characteristics Trophic Categories Insectivores Herbivores Carnivores Omnivores

Reveal the life habits of a mammal Chapter 30 Mammals 30.1 Mammalian Characteristics Teeth Reveal the life habits of a mammal Carnivores use canines to stab and premolars to slice and shear meat. Incisors of insectivores are long and curved, functioning as pincers in seizing insect prey.

Kidneys excrete or retain the proper amount of water in body fluids. Chapter 30 Mammals 30.1 Mammalian Characteristics Excretion Kidneys excrete or retain the proper amount of water in body fluids. Enables mammals to live in extreme environments Mammals

Mammals are the only animals that have a diaphragm. Chapter 30 Mammals 30.1 Mammalian Characteristics Respiration High levels of oxygen are required to maintain a high level of metabolism. Mammals are the only animals that have a diaphragm.

30.1 Mammalian Characteristics Chapter 30 Mammals 30.1 Mammalian Characteristics Circulation Mammals require a consistent supply of nutrients and oxygen to maintain homeostasis. Keeping oxygenated and deoxygenated blood separate makes the delivery of nutrients and oxygen more efficient.

30.1 Mammalian Characteristics Chapter 30 Mammals 30.1 Mammalian Characteristics The Brain and Senses Mammals have highly developed brains. Cerebral cortex is responsible for coordinating conscious activities, memory, and the ability to learn. Cerebellum is responsible for balance and coordinating movement.

Complex Behavior Senses Chapter 30 Mammals 30.1 Mammalian Characteristics Complex Behavior Senses The importance of the senses varies from one group of mammals to the next. Glands A system of glands secretes a variety of fluids that helps to regulate a mammal’s internal environment.

In mammals, the egg is fertilized internally. Chapter 30 Mammals 30.1 Mammalian Characteristics Reproduction In mammals, the egg is fertilized internally. Development of the embryo takes place in the female uterus. Movement Mammals must find food, shelter, and escape from predators.

Mammal Classification Chapter 30 Mammals 30.2 Diversity of Mammals Mammal Classification Monotremes Marsupials Placental mammals

Reproduce by laying eggs Chapter 30 Mammals 30.2 Diversity of Mammals Monotremes Reproduce by laying eggs Duck-billed platypus

Echidna

Very short period of development in the uterus Chapter 30 Mammals 30.2 Diversity of Mammals Marsupials Very short period of development in the uterus Crawl into a pouch made of skin and hair and continue development while being nourished by milk from the mother’s mammary glands Marsupials Kangaroo

Chapter 30 Mammals 30.2 Diversity of Mammals Placental Mammals Give birth to young that do not need further development within a pouch Humpback whale

Oh My!!

Chapter 30 Mammals 30.2 Diversity of Mammals