Day 2) Levels of organization - Life Science 11 - Joanna Peng

Cells

Cells are the smallest units of life. They are the basic building blocks of all living things. Some specialized cells carry out specific functions, such as epithelial cells, muscle cells, nerve cells, and fat cells.

Tissues

The group of cells that are similar in shape and function. For example, the skin that covers the outside surfaces of your body is epithelial tissue.

Organs

Tissues that are organized into larger structure that have one main function. For example, lungs, heart, liver, etc.)

Organs system

An organ system is a group of organs that have related functions work together to perform a major function in the body. For example, the respiratory system includes the lungs and airways, and its job is to help the body breathe.

Epithelial cells

Epithelial cells are specialized cells that cover and protect the surfaces of the body, both inside and outside.

Connective tissue

Connective tissue is a type of body tissue that supports, connects, protects, and holds other tissues and organs together.

Organism

An individual animal, plant, or single-celled life form. Can be unicellular or multicellular.