1.1. The urinary system collects and expels liquid waste from the body.
1.2. Urinary bladder, kidneys, ureters, and urethra.
2. Respiratory
2.1. The respiratory system exchanges gases, namely oxygen and carbon dioxide, between the air and the blood.
2.2. The nose, nasal cavity, pharynx, larynx, trachea, bronchi, and the lungs.
3. Endocrine
3.1. The endocrine system produces hormones. The body uses hormones for development, regulation of chemical balances, managing systems.
3.2. The system is made up of several glands: The pituitary, thyroid, parathyroid, adrenal, and pineal.
4. Reproductive
4.1. The reproductive system produces more humans. It is unique in the fact that it is the only system that differs with gender.
4.2. In males, the reproductive system is comprised of the testes, penis, scrotum, epididymis, vas deferens, ejaculatory ducts, seminal vesicles, prostate gland, bulbourethral glands, and the urethra. In females there are the ovaries, fallopian tube; and the uterus, vagina, vulva, and mammary glands.
5. Skeletal
5.1. The skeletal system provides a frame work for muscles to build on, and acts as a shield in the forms of the skull and ribs.
5.2. The skull is comprised of the cranium, maxilla, and mandible. The vertebrae, clavicle, scapula, ribs, the radius and ulna in the forearm, the humorous in the bicep, the pelvis,, the femur in the thigh, the tibia and fibula in the calves, the patella is the kneecap, coccyx is the tail bone, and dozens of bones in the hand and feet.
6. Integumentary
6.1. The integumentary system is the outer most system. Its function is to act as a barrier between the human body and the outside world.
6.2. Skin, oil excreting glands, nails, hair, and all external sensory organs.
7. Cardiovascular
7.1. The heart, blood, and blood vessels
7.2. The cardiovascular system transports blood and other vital fluids around the body through a network of veins and blood vessels. Blood also clots to prevent its own loss and to keep contaminants out of the body.
8. Lymphatic
8.1. The lymphatic system's primary function is to transfer immune cell-rich fluid known as lymph throughout the body. it also collects waste and hazardous substance then transfers them to be processed.
8.2. The Lymphatic system is made up of lymphatic tissue, lymphatic vessels, the spleen, the thymus gland, the tonsils, and red bone marrow.
9. Muscular
9.1. The muscle system produces most of the heat in the body and is responsible for movement. It also maintains posture and moves fluids through the body.
9.2. There are 49 principle superficial skeletal muscles, and many more minor muscles. for the sake of brevity, I will list several but not all of them. The Occipitofrontalis, nasalis, masseter, plastysma, trapezius, deltoid, pectoralis major and minor, triceps brachii, brachialis, flexor carpi radialis, Rectus abdominis, Psoas major, vastus lateralis and medialis, patella, and soleus to name a few.
10. Nervous
10.1. The nervous system is a web of nerves that spreads throughout the body. It send and receives signals from every tissue in the body. It is responsible for stimulating movement both consciously and automatically, processing sensory information, consciousness, thoughts, and emotions.
10.2. The brain, spinal cord, nerves, ganglia, and enteric plexuses.
11. Digestive
11.1. The digestive system breaks down food and absorbs the nutrients to fuel, build, and maintain the body.
11.2. The mouth, pharynx, esophagus, stomach, small intestine, large intestine, teeth, tongue, salivary glands, liver, gallbladder, and pancreas.
