The body is made up of cells. There are different types of cells in the body, but they all have one job: to keep the body alive. Cells need food and oxygen to live. They also need to get rid of waste.

Cells work together to form tissues. There are four main types of tissue in the body: muscle, epithelial, connective, and nervous. Muscle tissue helps the body move.

Epithelial tissue covers the body and protects it from germs. Connective tissue holds the body together. Nervous tissue sends messages to and from the brain.

The body is also made up of organs. Organs are groups of tissues that work together to do a specific job. For example, the heart is an organ that pumps blood through the body. The lungs are organs that help the body breathe.

The body is controlled by the brain. The brain is a mass of nerve cells that send and receive messages. The brain tells the body what to do. For example, when you see a ball, your brain tells your hand to reach out and grab it.

The human body is an amazing machine! It is made up of many different parts, each with a specific job to do. By working together, these parts allow us to move, breathe, and digest food. They also allow us to think and feel.

Body Topics

Books discussing Body

Experts discussing Body