Animal Internal Structure

Animals have internal structures inside their bodies that keep them alive. Internal structures are parts you cannot see from the outside, like bones, a heart, lungs, a brain, and a stomach. Each of these structures has an important job to do.

Your bones are hard structures that give your body shape and protect soft parts inside. Think of bones like the frame of a building that holds everything in place. Your heart is a muscle that pumps blood through your body, delivering oxygen and nutrients to all your cells. Your lungs are organs that help you breathe by taking in oxygen from the air and removing carbon dioxide.

Your brain is the control center that tells your body what to do. It helps you think, remember, and move. Your stomach is an organ that breaks down food so your body can use it for energy. Without a stomach, you could not get nutrients from the food you eat.

Plants also have internal structures, but they are very different from animal structures. Plants have roots, stems, and tubes that carry water, but they do not have hearts or brains. Animals need different structures because they move around, eat other living things, and breathe in different ways than plants.

Interesting Fact: Your heart beats about 100,000 times every single day, pumping around 2,000 gallons of blood through your body!