Tissue (biology)

Tissue means a part of an organ or organism. Tissues are groups of cells that work together to protect the body.They can also be defined as a group of cells having the same origin, structure and function. The cells look the same or almost the same. The work the cells do is also the same or almost the same.

Tissue is different from organ. Organs are made up of more than one kind of tissue. The heart is an organ. It is made up of different tissues. It has muscle tissue. It has connective tissue like the endocardium. The endocardium is the thin layer of tissue that forms the heart. The heart has valves that make sure the blood only goes forward through the heart. So the heart is an organ made from different tissues.All the organs in our body are made up of tissues,tissues help in protecting skin,mitosis etc.Tissues are an inevitable part of our life and without tissues we would not have organs and many more things!

The study of the structure of tissues under a microscope is called histology.