The cells that plug the leaks in case of injury in blood vessels areErythrocytesThrombocytesLeucocytesLymphocytes

The cells that plug the leaks in case of injury in blood vessels are Thrombocytes.

Here's a step-by-step explanation:

1. When a blood vessel is injured, the body needs to quickly stop the bleeding. This is where thrombocytes, also known as platelets, come into play.

2. Thrombocytes are small, irregularly shaped cells that are essential for blood clotting.

3. Upon injury, they rush to the site and stick to the lining of the injured blood vessel, forming a plug to help stop the bleeding.

4. They also release chemicals that attract more platelets to the site and that initiate the coagulation (clotting) process.

5. This results in the formation of a fibrin clot that acts as a more permanent plug to stop the bleeding.

6. Therefore, the cells that plug the leaks in case of injury in blood vessels are Thrombocytes.

Erythrocytes, Leucocytes, and Lymphocytes have different functions. Erythrocytes (red blood cells) are responsible for carrying oxygen around the body. Leucocytes (white blood cells) are part of the immune system and help the body fight off infections. Lymphocytes are a type of white blood cell that also play a role in the immune response.