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Function of the system: The circulatory system is the transportation system of the body. Also, the circulatory system carries chemicals from all points in the body. The fluids are able to carry the waste products and are able to dissolve gases for the cells.
The organs in the system:
-The heart
-The blood vessels
-The blood

The heart consists of four hallow chambers that works as pumps and pushes out blood throughout the body. This blood moves towards the heart entering through the the atria and goes out to the body through the ventricles.

The blood vessels allows the blood to to flow quickly from one region back to the heart. Also, the three main blood vessels are the arteries (take oxygen-rich blood away from the heart), veins (take the blood back to the heart), and capillaries (are very tiny blood vessels that that forms a connection between the arteries and the veins).

The blood is a very important substance since it is able to carry water, nutrients, waste products and oxygen to and from the body cells.

The circulatory system touches every organ and system of the body. The circulatory system is connected to all the body's cells so that it is able to transfer oxygen effect

The lungs aren't considered part of the circulatory system, but makes it possible for the heart to function correctly. The human body is a closed circulatory system where the heart is connected to a complete system of vessels, while there is a open circulatory system, where the primitive organisms where the heart pumps fluids through the body, but there is no complete systems of vessels.

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The endocrine system is sets of glands that produce hormones. The endocrine system is made up of
-Thyrotropin-releasing hormone (TRH)
-Growth hormone-releasing hormone (GHRH)
-Growth hormone-inhibiting hormone (GHIH)
-Gonadotropin-releasing hormone (GnRH)
-Corticotropin-releasing hormone (CRH)
-Oxytocin
-Antidiuretic hormone (ADH)

These glands help produce hormones that regulate metabolism, growth and other things.

All of the releasing and inhibiting hormones affect the function of the anterior pituitary gland. TRH stimulates the anterior pituitary gland to release thyroid-stimulating hormone. GHRH and GHIH work to regulate the release of growth hormone—GHRH stimulates growth hormone release, GHIH inhibits its release. GnRH stimulates the release of follicle stimulating hormone and luteinizing hormone while CRH stimulates the release of adrenocorticotropic hormone. The last two hormones—oxytocin and antidiuretic hormone—are produced by the hypothalamus and transported to the posterior pituitary, where they are stored and later released.

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The Digestive system helps you get rid of waste in the body. The digestive system includes the Esophagus, tongue, teeth, stomach, teeth, gallbladder, small and large intestines.

The digestive process begins with when you eat food. Your teeth break the food down. Next is the food then travels down to the esophagus all the way to the stomach. In the stomach the food drops into acid that is in the stomach. This helps the food properly break down. The food then travels into the small intestines. The small intestines gets nutrients held within the food. The food that travels into the large intestines.

If we did not have the digestive system all the food we eat would stay inside of our body or go right through us if we were to put it into our mouth.

But we can't forget about the pancreas and the liver supports the small intestines, also secretion of the small intestines. The pancreas is a large gland located just inferior 6 inches long ans shaped like a short, lump snake head. The gallbladder is a small, pear shaped organ located just posterior to the liver, the gallbladder is used to store and recycle excess bile from the small intestines.

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The respiratory system is one of the most important part of the body. The respiratory system helps you breath. The respiratory system provides oxygen for the body. It helps convert oxygen to carbon dioxide.

The major parts of the respiratory system is the lungs, the muscles of respiratory which is the Diaphragm.

Red blood cells collect oxygen from the lungs and carry it to the parts of the body that need the oxygen. The human body needs oxygen to sustain itself.

The respiratory system helps the body properly function, the respiratory system helps the body to maintain the way it is.

The diaphragm is the main muscle of the respiratory and plays a big role in the respiratory process. The diaphragm contracts and is drawn inferiority into the abdominal cavity unit is flat at the same time it elevates the anterior rib cafe like the handle of a bucket.

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The nervous system is a complex collection of the nerves and specialized cells know as neurons that transmit signals to a part of your body. Wonder why you have those shivers everyone once an a while that's the movement of a nerve in your body.

Nerves are cylindrical bundles or fibers that start at the brain and central cord and branch out to every other part of the body. Neurons send signals to other cells through thin fibers called axons. This causes chemicals called neurotransmitters that released at junctions called synopses, the NIH noted.

The nervous system is tissue made up of two classes of cells: Neurons and Neuroglia.

Neurons are also know as nerve cells, these nerves communicate within the body by transmitting signals.

Neuroglia also know as glial cells which is the helper in the nervous system. The neuroglia helps maintain the functions in the nervous system to make sure they stay in check.

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The skeletal system includes all the bones and joins in the body. Each bone is complex living organ that is made up of living cells, protein fibers, and minerals. The skeletal system provides attachment points for muscles to allow movement at the joint.
The skeletal system includes:
-The skull
-Hydoid
-auditory ossicles
-ribs
-sternum
-vertebral column
-upper limb
-lower limbs
-pelvic gridle
-pectoral (shoulder) girde

The skull has 22 bones that make it up. Only 21 of these bones fuse to give strength and protection as an adult. The bone that does not fuse is called the mandible.

The hyoid and auditory ossicle is a small, u-shaped bone found just inferior to the mandible. The hyoid is the only bone in the body that does not form a join with another bone. The auditory ossicle are the smallest bone in the body.

There are 26 vertebrae from the vertebral column of the human body. These vertebrae help the main regions of the body.

The ribs and sternum are in the same region the sternum or breast bone is thin, it has a knife shape. It is the midline of the anterior side of the thoracic region. The ribs cage is consisted of 12 bones that also has the sternum. The ribs protect the lungs.

The perlvic girdle and lower limbs work together. The pelvic gridle connect the lower bones to axial skeleton. This includes the femur, hip joint, knee join and foot.

Pelvic gridle and upper limbs also work together like the lower limbs. This includes the shoulder joints, elbow joints and the bones in the hand.

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The muscular system is what helps the body move. The muscular system makes up about of your body weight . Each of these muscles help you throughout your daily duties. The muscular system does not only the support the body it helps with your posture.

There are three types of muscle tissues: Visceral, cardiac, and skeletal.
-The visceral muscles are inside of organs for example the stomach. The visceral muscle make organs contract to move substances through the different organs. The Visceral muscle is controlled buy the unconscious part of the brain.
-The cardiac muscle is only in the heart. Cardiac muscle is responsible for pumping the blood throughout the body,
- The skeletal muscle is the only voluntary muscle tissue in the human body that is controlled consciously every movement in the skeletal muscles.

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The human body is what we are the human body provides life somewhat to us. It helps us breath it helps us see things, taste, and live. I'm here to explain what some of those organs inside of our body provide for us.

Websites:
http://www.livescience.com/26496-endocrine-system.html
http://kidshealth.org/en/parents/heart.html
http://www.innerbody.com/image/endoov.html
http://www.biology4kids.com/files/systems_circulatory.html