What color is the blood of earthworms?

The blood of earthworms is rose-red. Earthworms are common terrestrial annelids. They live in the soil, go out day and night, feed on livestock and poultry droppings and organic waste, swallow them together with soil, and also eat fragments such as plant stems and leaves. Earthworms can loosen soil, improve soil, improve fertility and increase agricultural production.

The blood of any animal is made up of plasma and blood cells. The color of blood is determined by blood proteins present in plasma or blood cells. Different blood proteins have different colors. The blood protein containing copper element, called hemocyanin, makes the blood blue or cyan, the vanadium-containing blood protein is called hemocyanin, which makes the blood green, and the hemoglobin containing iron element is called hemoglobin, which makes the blood red. The blood of earthworms is rose-red, the blood of prawns and river crabs is light blue, the blood of horseshoe crabs is blue, the blood of clams is light blue, the blood of squid is green, and the blood of vertebrates such as fish, amphibians, reptiles, birds, mammals and even our humans is red.

Earthworms generally stay on the surface of the soil, but can drill into a depth of 2 meters (7 feet) in dry weather or winter. There is an Asian plant that can climb trees after heavy rain to prevent drowning. Earthworms provide food for a variety of birds and animals, and indirectly provide food for human beings. Loosening the soil is conducive to ventilation and drainage, dragging organic matter into the dug holes to speed up decomposition, thereby increasing the nutrients needed for plant growth. Earthworms can also be used as bait, so it is commonly known as fishing insects.