The Human Body: The Circulatory System

The body is a system of interacting subsystems composed of groups of cells. The human body is an organism, which based on the levels of organization, means it is made up of organ systems. These organ systems include the: skeletal, muscular, respiratory, circulatory, digestive, nervous, and the excretory systems. Each of these systems has an important function that helps keep the organism alive and each system interacts with several (if not all) of the other systems. For example, the circulatory system has the function of providing the body with blood. The heart pumps out blood to the arteries that travel throughout the body. The capillaries connect the arteries to the veins. The veins take blood back into the heart in a cycle. Some other features

The organs are made up of tissues working together, such as the smooth/cardiac muscle tissues and blood. The tissues are made up of different types of cells working together, such as red and white blood cells, along with smooth/cardiac muscle cells. Therefore it can be concluded that the circulatory system is composed of groups of cells.

All of the other organ systems throughout the body are also made up of organs, tissues, and cells. Some of tissues in the bones of the skeletal system are marrow, cartilage, ligaments, and bone tissue, and the cells inside are osteoprogenitor, osteoblasts, osteoclasts, and osteocytes. Inside of the muscular system are the skeletal tissues. In the respiratory, digestive, and excretory systems there are smooth muscle tissues and cells. In the nervous system, there is a nerve network tissue with neuron cells. Finally, inside the muscular system, there are skeletal, smooth, and cardiac tissues and cells.

In conclusion, this proves that all the organ systems in the body have organs, which are made of tissues, and in turn, made up of

The blood carries oxygen from the lungs of the respiratory system to the body’s cells, and take carbon dioxide from the cells to the lungs. The tissues from the circulatory system makes up the heart and blood vessels, which are part of the muscular system. Finally, the nervous system sends signals from the brain to the heart for it to pump blood throughout the body.

By studying the circulatory system, and following the rules of the levels of organization, we know that the system is made up of organs, such as the heart and blood vessels. The organs are made up of tissues working together, such as the smooth/cardiac muscle tissues and blood. The tissues are made up of different types of cells working together, such as red and white blood cells, along with smooth/cardiac muscle cells. Therefore it can be concluded that the circulatory system is composed of groups of