Body Systems

The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis.

The respiratory system is the organs and other parts of your body(i.e. Nose and nasal cavity, Sinuses, Mouth, Throat (pharynx), Voice box (larynx), Windpipe (trachea), Diaphragm, Lungs, Bronchial tubes/bronchi, Bronchioles, Air sacs (alveoli), Capillaries) involved in breathing, when you exchange oxygen and carbon dioxide.

The digestive system includes the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus. It also includes the salivary glands, liver, gallbladder, and pancreas, which make digestive juices and enzymes that help the body digest food and liquids.

The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.

The skeletal system is your body's central framework. It consists of bones and connective tissue, including cartilage, tendons, and ligaments. It's also called the musculoskeletal system.

The endocrine system(including hypothalamus, pituitary gland, pineal gland, thyroid, parathyroid, thymus, ovaries, and testes) is a network of glands in your body that make the hormones that help cells talk to each other. They’re responsible for almost every cell, organ, and function in your body.

The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes. The Excretory system is responsible for the elimination of wastes produced by homeostasis.

The lymphatic system or lymphoid system(including bone marrow, thymus, lymph nodes, spleen, appendix, adenoids/tonsils, mucous membranes, Peyers Patches) is an organ system in vertebrates that is part of the immune system, and complementary to the circulatory system. It comprises of a large network of lymphatic vessels, lymph nodes, lymphatic or lymphoid organs, and lymphoid tissues.

The tissues, glands, and organs involved in producing offspring (children). In women, the reproductive system includes the ovaries, the fallopian tubes, the uterus, the cervix, and the vagina. In men, it includes the prostate, the testes, and the penis.

The integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands.