There are 10 systems of the human body.
The Circulatory or Cardiovascular System includes the heart, the blood, and the blood vessels.
The Dermal or Integumentary System includes the skin, hair, and nails.
The Digestive or Gastrointestinal System includes the mouth, the pharynx, the esophagus, the stomach, the liver, the gall bladder, the pancreas, the small intestine, the large intestine, the rectum, and the anus.
The Endocrine or Glandular or Hormonal System includes all of the glands in the body.
The Excretory System includes the skin, the lungs, the liver, the kidneys, and the large intestine.
The Muscular System includes all of the muscles and tendons of the body.
The Nervous System includes the brain, the spinal cord, and all of the nerves of the body.
The Reproductive System is different in men and women. The Male Reproductive System mainly includes the testes and the penis. The Female Reproductive System mainly includes the ovaries and the uterus.
The Respiratory or Pulmonary System includes the nose, the mouth, the pharynx, the larynx, the trachea, the bronchial tubes, and the lungs.
The Skeletal System includes all of the bones, joints, ligaments, and tendons of the body.
There are 3 sub-systems of the Circulatory or Cardiovascular System.
The Immune System includes all of the lymphocytes and antibodies of the body.
The Lymphatic System includes the tonsils, the thymus gland, the liver, the spleen, and all of the lymph nodes of the body.
The Urinary System includes the kidneys, the ureters, the bladder, and the urethra.
There is 1 sub-system of the Nervous System.
The Sensory System includes, the eyes, the ears, the nose, the tongue, and the skin.
Source(s) My very smart brain.