Why mamals has bleed?

Mammals have blood because it is essential for their survival. Blood carries oxygen and nutrients to cells throughout the body, removes waste products, and helps regulate body temperature. It also plays a crucial role in the immune system, clotting to prevent excessive bleeding, and transporting hormones and other important substances. Without blood, mammals would not be able to function properly and would not be able to survive.

Mammals have blood because it is necessary for their survival. Blood transports oxygen, nutrients, and hormones throughout the body, and it also removes waste products. Without blood, mammals would not be able to survive.