Answer:
1.You know that your body is made of cells. When groups of cells do the
same kind of work, they are called tissues. The word tissue comes from a
Latin word meaning to weave. Cells that make up tissues are sometimes
woven together.
2. You have four main types of tissues: epithelial, nervous, muscle, and
connective tissue. Epithelial tissue covers the outside of the body. It also
lines organs and cavities. Nervous tissue sends electrical signals. Muscle
tissue helps you move. Connective tissue joins bones and cushions organs.3.
When groups of tissues work together, they are called organs. Some
examples of organs are the heart, lungs, skin, and stomach. When organs work together,
they are called systems. For example, your heart, lungs, blood, and blood vessels work
together. They make up the circulatory system.
4. There are eleven systems in the human body: muscular system, respiratory system,
digestive system, integumentary system skin, skeletal system, circulatory or
cardiovascular system, excretory or urinary system, reproductive system, nervous
system, lymphatic system, and endocrine system. Each system has a special job.
5. All of your body systems have to work together to keep you healthy. Your bones and
muscles work together to support and move your body. Your respiratory system takes in
oxygen from the air. It also gets rid of carbon dioxide.
6. Your digestive system absorbs water and nutrients from the food you eat.
