The endocrine system works with 2 glands 
endocrine glands, which release hormones directly into the bloodstream and exocrine glands, like lymph nodes and sweat glands, which are not part of the endocrine system.
 
Organs in the endocrine system are: hypothalamus, pituitary gland, pineal gland, thyroid, parathyroid gland, thymus gland, adrenal glands, pancreas,

 

The calcified bones of the skeleton work together with the circulatory system. Marrow is created inside bones and aids the production of red and white blood cells. The circulatory system that circulates the red and white blood cells through the body. Red and white blood cells are necessary for the body to function properly, and these cells couldn’t be circulated through the body unless the bones of the skeletal system first created marrow. 

 

The messages then help you move all of your body and feel sensations, such as pain. Then nerves carry that data to and from your brain.

Different kinds of neurons send different signals. Motor neurons tell your muscles to move. Sensory neurons take information from your senses and send signals to your brain. Other types of neurons control the things your body does automatically, like breathing, shivering, having a regular heartbeat and digesting food.

The nervous system has two main parts. Each part contains billions of cells called neurons, or nerve cells:

Central nervous system (CNS): Your brain and spinal cord make up your CNS. Your brain uses your nerves to send messages to the rest of your body. Each nerve has a protective outer layer called myelin. Myelin insulates the nerve and helps the messages get through.

Peripheral nervous system: Your peripheral nervous system consists of many nerves that branch out from your CNS all over your body. This system relays information from your brain and spinal cord to your organs, arms, legs, fingers and toes. Your peripheral nervous system contains your:

It works with other systems, which regulate involuntary functions such as heartbeat and breathing.

 

 

The cells of both parts of the immune system are made in different organs of the body, including:

 There are two main types of leukocytes, or white blood cells: 
Phagocytes-These cells surround and absorb pathogens and break them down, effectively eating them. 
2. Lymphocytes- help the body remember previous invaders and recognize them if they return to attack again. 

The respiratory, nervous and endocrine systems are highly involved with immune function. The lungs are integrally involved with exposure of the immune system to pathogens and, like the digestive system, have large amounts of immune tissues. The nervous and endocrine systems share many of the same signaling chemicals as the immune system and along with the immune system are essential to the body's balance and homeostasis. 

 

The male and female reproductive cycles are controlled by hormones released from the hypothalamus and anterior pituitary and hormones from reproductive tissues and organs. 

The reproductive system is involved with sexual development and the production of offspring. Endocrine glands in the reproductive system produce sex hormones that are responsible for secondary sex characteristics in men and women. It also controls female secondary sex characteristics, such as breast development.