Sub-System | Body parts | Function | Common Diseases |
| Cardiovascular System | Heart, Blood vessels (Arteries, Veins and Capillaries), Blood | Flow of blood (and nutrients) throughout body | Narrowing of the arteries, Heart attack, Abnormal heart rhythms or arrhythmias, Heart failure, Congenital heart disease |
| Digestive System | Alimentary Canal (Oral Cavity, Esophagus, Stomach, Small Intestine, Large Intestine, Anus), Liver, Pancreas, Salivary glands, Teeth, Tongue | Digestion and absorption of food | celiac disease, inflammatory bowel disease, irritable bowel syndrome |
| Endocrine System | Endocrine glands (Pituitary gland, Thyroid gland, Parathyroid glands, Adrenal glands, Pancreas (endocrine part), Testes (endocrine part), Ovary (endocrine part), Liver (endocrine part)) | Regulation of body functions (Chemical coordination) | Hypothyroidism, Osteoporosis, Prediabetes, Type 1 & 2 Diabetes |
| Female Reproductive System | Uterus, Ovaries, Vulva, Labia, Clitoris | Formation of eggs and bearing the fetus during development | Cervicitis, Dysmenorrhea, Hysterectomy, Mastectomy |
| Immune System | Antibodies, white blood cells, tonsils, and thymus | Natural body system to fight infections | Type 1 diabetes, rheumatoid arthritis, lupus |
| Integumentary System | skin, hair, nails, and exocrine glands | Protects from environment, chemicals, UV light etc. | Acne and warts, chronic skin conditions |
| Lymphatic System | Bone marrow, spleen, thymus gland, lymph nodes, and the tonsils | Helps body to get rid of the toxins, waste and other unwanted materials | Glandular fever, Hodgkin’s disease, Tonsillitis |
| Male Reproductive System | Penis, Testes | Formation of sperms and semen, and fertilizing the female | Hypospadias, Hydrocele, Varicocele, Cryptorchidism |
| Muscular System | Muscles (Skeletal Muscles, Smooth muscles, Cardiac Muscles) | Motor power for movements of body parts | Muscular Dystrophy, Cerebral Palsy, Dermatomyositis, Myasthenia Gravis |
| Nervous System | Brain, Spinal Cord, Nerves, Nerve Endings | Control and Coordination of all body functions (Nervous coordination | Alzheimer’s Disease, Bell’s Palsy, Cerebrovascular Accident, Encephalitis |
| Respiratory System | Lungs, Nose, Trachea, Bronchi, Bronchioles, Alveolar sacs, Alveoli | Gaseous exchange | Chronic obstructive pulmonary disease pneumonia, influenza |
| Skeletal System | Bones, Associated cartilages, Joints | Strength, Support, Shape, Protection, Leverage, Cell Production | Osteoarthritis, Rheumatoid Arthritis and Osteoporosis |
| Urinary System | Kidneys, Ureters, Urinary bladder, Urethra | Regulation of body’s internal environment, and production and excretion of urine | cystitis, pyelonephritis, urethritis |
