Interdependence of the main systems of the human body. Different specialized cells make up different tissues. The four main types of tissue are muscular, epithelial, connective and nervous. These major tissue types work together to form organs, for example the heart is made up of many tissue types. Cardiac tissues include cardiac muscle made up of cardiac muscle cells, fibrous connective tissue that holds the heart in place, epithelial tissue that protects the inner lining of the heart, and many others. The heart works together with the blood and various blood vessels to make up the cardiovascular system. Its main functions are to transport oxygen, nutrients, wastes, and more throughout the body to protect the body from invading microbes and for hemostasis and homeostasis. The cardiovascular system works interdependently with other body systems to achieve their functionality. (Widamaier, et al 2011:5) The respiratory system works interdependently with the cardiovascular system to deliver oxygen to body tissues and remove oxygen from the body. The respiratory system is made up of the nasal and oral cavities, the larynx, the trachea, the bronchi and the lungs. The airways of the respiratory system condition the air, so the air travels into the alveoli of the lungs. There are many alveoli and these are lined with many capillaries to allow a large surface area for gas exchange between the air in the lungs and the blood in the capillaries. The alveolar wall is a thin membrane that allows gases to pass through. The oxygen level in the blood is lower than the oxygen level in the alveolar gas, which creates a pressure difference that causes oxygen to move into the blood. CO2 in the blood is higher in the blood than in the air, so the CO2 trav...... middle of paper ......em works interdependently with the cardiovascular system to be able to supply nutrients absorbed through digestion to where it is needed in the body. The walls of the small intestine have a thin epithelial layer and therefore are equipped with many capillaries for easy absorption of nutrients into the bloodstream. (Turtle, Edd 2004)The integumentary system consists of skin, hair, nails and various glands. Its functions are the protection of the internal organism from UV rays, invading microbes and homeostasis. They work interdependently with the nervous system to create the sense of touch through sensory receptors located on the skin. It also works with the cardiovascular system to regulate body temperature, for example if the body temperature is too high the capillaries near the skin will open creating more blood flow to the skin to increase temperature loss. (Bailey, Regina 2010)