Class Mammalia (Phylum Chordata of kingdom Animalia)

Animals belonging to class Mammalia are referred to as mammals. Mammals are one of the most evolved species in the animal kingdom categorized under vertebrata.

They exhibit advanced characteristics which set them apart from all other animals. They are characterized by the presence of mammary glands through which they feed their younger ones.
Characteristics Of Mammals
Following are a list of distinct characteristics of mammals that separates them from other classes:

Mammals are warm-blooded animals who give birth to their younger ones.

They are the most dominant form of animals found in almost all types of habitats.

They have mammary glands that help them produce milk to feed their younger ones

Presence of region of the brain known as Neocortex

Their skin possesses oil glands (sebaceous glands) and sweat glands (sudoriferous glands).

The fur of hair throughout the body which helps animals adapt to their environment.

They are heterodont, i.e., possess different types of teeth.

Mammals also possess cervical vertebrae.

The skull is dicondylic.

The trunk is divided into thorax and abdomen.

The mammals respire through lungs.

Good sense of hearing as mammals are aided with 3 middle ear bones

Mammals have a four-chambered heart. The sinus venous and renal portal system are absent.

Presence of single-boned lower jaws.

The brain is well developed divided into cerebrum, cerebellum and medulla.

They possess 12 pairs of cranial nerves.

Exhibit one of the most advanced forms of Diaphragms.

The mammals can lay eggs also. They are known as viviparous.

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