Interdependence of the main systems of the human body. Different specialized cells make up different tissues. The four main tissue types are muscle, epithelial, connective, and nervous. These main types of tissues work together to form organs. For example, the heart is made up of many types of tissue. Heart tissues include heart muscle made up of heart 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 with blood and various blood vessels to make up the cardiovascular system. Its main functions are to transport oxygen, nutrients, wastes and others throughout the body in order to protect the body from invading microbes and ensure 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 supply oxygen to body tissues and remove oxygen from the body. The respiratory system consists of the nasal and oral cavities, larynx, trachea, bronchi and lungs. The airways condition the air, then the air circulates through the alveoli of the lungs. There are many alveoli and these are covered 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 allowing oxygen to enter the blood. Blood co2 is higher in the blood than in the air, so the co2 travels...... middle of paper ......em works interdependently with the cardiovascular system to be able to provide nutrients absorbed through digestion to where it is needed in the body. The walls of the small intestine have a thin epithelial layer and numerous capillaries to facilitate the absorption of nutrients into the bloodstream. (Turtle, Edd 2004)The integumentary system consists of skin, hair, nails and various glands. Its functions protect the interior of the body against UV rays, invading microbes and ensure homeostasis. Working 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 your 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)