Mammals are a class in the chordate phylum. Mammals are like other chordates in that they have backbones. Mammals have several distinct characteristics.
There are several major groups of mammals. Below is a list of these groups and their links on this site:
System
Type
|
Mammals
System
|
Muscular-Skeletal | A mammal has an inner skeleton. It has developed muscles and generally have four limbs attached. |
Digestion | A mammal has a developed digestive tract with mouth, teeth, stomach, intestines. Herbivores eat plants, carnivores eat meat and omnivores eat both. |
Nervous | A mammal has a highly developed brain, nerves and sensory organs such as eyes, nose, mouth, ears and touch. |
Circulation | A mammal has a four chambered heart, blood vessels and blood within their system. |
Respiration | A mammal has lungs and breathes in oxygen and gives off carbon dioxide. |
Reproduction | A mammal reproduces sexually with the female being fertilized by the male internally. Mammals have live birth and care for their young for quite a time after birth. |
Excretion | A mammal gas kidneys and is covered with skin. The skin has hair. Mammals are warm blooded. |
Symmetry | A mammal has bilateral symmetry. |
Coloration | A mammal can be various shades of brown, black, tan, white. |