Body Systems

Lucy Kim

The purpose of the integumentary system is to protect the body from harmful pathogens, UV radiations, infections and injury. The system also regulates temperature, eliminates waste, produces vitamin D and gathers information.

The integumentary system is vital to the body's function because it maintains a lot of the body's homeostasis. They do this by shivering and sweating to adjust body temperature and etc.

The Organs


Skin is the largest organ of the human body. It is the first line of defense against harmful pathogens so it is vital to the immune system as well. It protects the body from UV rays, invaders, and elements. It also regulates temperature. Without it there would be no barrier between the outside world and your inner organs.


Nails are also part of of the integumentary system. They help protect the tips of your fingers and toes which were built to handle large amounts of mechanical stress such as; typing, writing, building and playing instruments. Also, state of your nails can also give clues on the state of your health.


Hair is a very important part of the integumentary system as it helps the skin keep the body warm. The hair on the head itself protects the body from sunlight, physical trauma, and controls and prevents heat loss.


Exocrine glands are structures that excrete materials or secret materials through the glands and out of the body. The two main glands in our body are sebaceous glands and sweat glands.

Sebaceous glands are often referred to as oil glands. These glands secrete an oily substance called sebum.

Sweat glands are divided into two categories. Apocrine glands secrete material in hair follicles, therefore they are located in smellier places of the body. Eccrine glands are located everywhere else on the body and secrete onto the skin.

The circulatory system (aka. the cardiovascular system) carries food and oxygen to cells all over the body, and transports the waste away. Not only does it carry oxygen to all the cells, it transports hormones for the endocrine system, nutrients for the digestive system and carbon dioxide for the respiratory system. This makes this system VITAL for the body.


The Heart

The heart is possibly one of the most popular and well-known organs out there. It is composed of four two sided chambers that have the sole job of pumping blood throughout the body. Hearts are made out of strong muscle tissue and are heavily protected by the ribcage.

Blood Vessels

The common belief of there being only two different kinds of blood vessels are actually a misconception. There are actually three different kinds of blood vessels; arteries, veins and capillaries. The arteries and veins are durable and thick- until they thin and branch out into capillaries.

Arteries carry blood away from the heart and therefore are highly oxygenated. They are the red blood vessels. They carry oxygen to cells all around the body. They endure high blood pressures along with the capillaries.

Capillaries are actually the most common vein in our body. They are the smallest veins in our body. They run very close to the cells of the tissues of organs in order to exchange nutrients, wastes and other materials.

Veins are the blue blood vessels. They carry blood back to the heart. These blood cells carry carbon dioxide that the cells secreted. The veins endure very low blood pressure and rely on inertia and the movement of the body to push blood back into the heart.


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