Multicellular Organisms MS-LS1-3

Circulatory system

The system of the heart, blood, and blood vessels, it moves oxygen, nutrients, and waste. Circulatory system. The circulatory system is like a delivery network in your body, where the heart pumps blood through blood vessels to bring oxygen and nutrients to cells and carry away waste.

Digestive system

The system of organs that breaks down food into nutrients for use by the body. Digestive system. The digestive system is the part of your body that turns food into energy and nutrients.

Endocrine system

The glands and hormones that regulate body conditions and growth, like the thyroid, are part of the endocrine system. The endocrine system is a network of glands that sends hormones through the blood to help control how our bodies grow and stay balanced.

Immune system

The cells and tissues of the body that fight invading organisms. Immune system. The immune system is the body's defense system that helps protect us from germs and illnesses.

Multicellular

An organism that is made up of many cells, like all animals, plants, and fungi. Multicellular means having many cells that work together to make up a living thing.

Muscular system

The organ system made up of muscles that help the body move is the muscular system. The muscular system is a network of muscles in your body that work to make you move.

Nervous system

The brain, spinal cord, and nerves which relay information. Nervous system. The nervous system is like a communication network in the body that sends and receives messages to help control everything we do, like moving, thinking, and feeling.

Respiratory system

The organs that transfer oxygen from the air to the body, like the nose, trachea, and lungs, make up the respiratory system. The respiratory system is the part of your body that helps you breathe and get oxygen into your blood.

Skeletal system

All the bones in the body that support it, help it to move, and protect internal organs. Skeletal system. The skeletal system is the framework of bones that supports and shapes our body, allowing us to move and protecting our organs.