Major Organ Systems:
* Circulatory System: Heart, blood vessels (arteries, veins, capillaries), blood
* Digestive System: Mouth, esophagus, stomach, small intestine, large intestine, rectum, anus, liver, pancreas, gallbladder
* Endocrine System: Pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas (islet cells), ovaries (in females), testes (in males)
* Integumentary System: Skin, hair, nails
* Lymphatic System: Lymph nodes, lymph vessels, spleen, thymus, tonsils
* Musculoskeletal System: Muscles, bones, cartilage, tendons, ligaments
* Nervous System: Brain, spinal cord, nerves
* Respiratory System: Nose, pharynx, larynx, trachea, bronchi, lungs
* Reproductive System:
* Male: Testes, epididymis, vas deferens, prostate gland, seminal vesicles, penis
* Female: Ovaries, fallopian tubes, uterus, cervix, vagina
* Urinary System: Kidneys, ureters, bladder, urethra
Additional Organs:
* Eyes: While sometimes considered part of the nervous system, the eyes are complex organs with specialized structures.
* Ears: Also often grouped with the nervous system, ears are responsible for hearing and balance.
* Tongue: A muscular organ involved in taste, speech, and swallowing.
Important Notes:
* Organs within organs: Some organs contain smaller, specialized structures that are sometimes considered organs in their own right. For example, the liver contains bile ducts, and the heart has valves.
* Individual Variation: The exact number and types of organs can vary slightly from person to person.
* Embryonic Development: During embryonic development, some structures that are considered organs later in life are referred to as "organ primordia".
This list is not exhaustive, but it provides a comprehensive overview of the major organ systems and organs of the human body. If you'd like to explore specific organs or systems in more detail, please ask!
